Volkswagen Caddy (SB; 2024 – 2025) – fuse and relay box diagram

Posted on 28 August 202528 August 2025 by admin

Volkswagen Caddy (SB; 2024 – 2025) – fuse and relay box diagram

Year of production: 2024, 2025

The fifth-generation Volkswagen Caddy was produced from 2021 to present. In this guide, you will find descriptions of the fuses and relays for the Volkswagen Caddy 5 (2021 – 2023 models), including fuse box diagrams, their locations.

Passenger Compartment

Fuse box diagram

Assignment of the fuses in the passenger compartment

No.	A	Function/component
F1	–	–
F2	30	ATO, Rear fresh air control unit
F3	25	ATO, Trailer control unit, left (vehicles with factory-fitted towing bracket)
F4	30	ATO, Control unit for reduction agent heating [for vehicle with diesel engines]
F5	25	ATO, Parking lock actuator
F6	30	ATO, Interior lighting, On-board power supply control unit
F7	30	ATO, Seat heating, Heating and air conditioning control unit
F8	25	ATO, Control unit for special vehicles (depending on the equipment)
F9	30	ATO, Driver’s door control unit [for vehicle with left-hand steering], Front passenger’s door control unit [for vehicles with right-hand steering]
F10	25	ATO, Control unit for special vehicles
F11	15	ATO, Trailer recognition control unit (vehicles with factory-fitted towing bracket)
F12	40	MAXI+, Right exterior lighting, On-board power control supply control unit
F13	40	MAXI+, Central locking, On-board power control supply control unit
F14	40	MAXI+, Interior with socket, 12V/230V
F15	–	–
F16	7,5	MINI, Airbag control unit, Seat occupied sensor radio communication control unit
F17	10	MINI, Relay for reducing agent dosing system [for vehicles with diesel engines] / Supply module of the reducing agent dosing system [for vehicles with diesel engines] / Recovery tank [for vehicles with diesel engines]
F18	10	MINI, Electronic steering column lock control unit / Access and start authorization interface / Anti-theft alarm control unit 2 / Anti-theft alarm control unit 3 / Anti-theft alarm control unit 4 / Anti-theft alarm control unit 5
F19	7,5	MINI, Instrument cluster / Control unit for emergency call module and communication unit
F20	7,5	MINI, Telephone, Storage compartment with mobile phone interface / Transmission and reception stabilization control unit / USB port 1
F21	7,5	MINI, Interior lighting relay / Blind spot monitoring control unit / Blind spot monitoring control unit 2 / Around view camera rear view
F22	–	–
F23	15	MINI, Contact plate in left B-pillar
F24	15	MINI, All-wheel drive control unit
F25	25	ATO, Control unit for special vehicles
F26	30	ATO, Front passenger door control unit
F27	25	ATO, Control unit for special vehicles
F28	–	–
F29	15	ATO, Trailer charging cable ( vehicles with factory-fitted towing bracket)
F30	20	ATO, Infotainment components, Electronic information system control unit 1
F31	25	ATO, trailer control unit, right (vehicles with factory-fitted towing bracket)
F32	15	ATO, Rear lid control unit
F33	15	ATO, Contact plate in right B-pillar
F34	–	–
F35	40	MAXI+, Left exterior lighting, On-board power supply control unit
F36	40	MAXI+, Blower regulator, Supply air fan control unit
F37	–	–
F38	–	–
F39	–	–
F40	7,5	MINI, anti-theft alarm
F41	7,5	MINI, Data bus diagnostic interface
F42	7,5	MINI, Selector lever / Selector lever position indicator
F43	10	MINI, Heating and air conditioning control unit / Interior temperature sensor / Rear window heating relay / Tyre pressure monitoring control unit / Auxiliary heater radio signal receiver
F44	7,5	MINI, Electromechanical parking brake button / Dash panel switch module, center / Light control panel / Anti-theft alarm sensor / Air humidity, rain and light sensor / Front interior light
F45	7,5	MINI, Steering column electronics control unit
F46	7,5	MINI, Display for front control, display and information unit
F47	–	–
F48	–	–
F49	–	–
F50	–	–
F51	–	–
F52	20	ATO, Cigarette lighter [Optional][5] / 12V socket [Optional][5] / 12V socket 3 [Optional][5] / 12V socket 4 [Optional][5]
F53	–	–
F54	–	–
F55	–	–
F56	–	–
F57	–	–
F58	7,5	MINI, Adaptive cruise control unit [Optional] / Parking assistance control unit [Optional] / Front camera for driver assistance systems [Optional]
F59	7,5	MINI, Electromechanical parking brake button / Reversing light switch [Optional] / Refrigerant circuit pressure sensor / Socket relay
F60	7,5	MINI, Diagnostic connector
F61	7,5	MINI, Clutch pedal position sensor [Optional] / Starter relay 1 / Starter relay 2
F62	7,5	MINI, USB charging socket 1 [Optional]
F63	–	–
F64	–	–
F65	–	–
F66	15	ATO, Rear window wiper.
F67	30	MAXI+, Rear window heating
R1		Socket relay
R2		Power supply relay terminal 15
R3		Rear window heating relay
R4		Relay for reducing agent dosing system [for cars with diesel engine]

Engine Comparment

Fuse box diagram

Assignment of the fuses in the engine compartment

No.	A	Function/component
F1	80	MIDI, Power steering control unit
F2	7,5	ATO, ABS control unit / Main relay [for cars with a gasoline engine] / Terminal 30 power supply relay [for vehicles with diesel engines] / Engine control unit
F3	7,5	ATO, [with engine letter designation DHFA] Shut-off and safety valve 1 for gas cylinder / Shut-off and safety valve 2 for gas cylinder / Shut-off and safety valve 3 for gas cylinder / Shut-off and safety valve 4 for gas cylinder / Shut-off and safety valve 5 for gas cylinder
F4	15	ATO, Headlight front left
F5	15	ATO, Headlight front right
F6	–	–
F7	30	ATO, Gearbox oil cooling pump [Optional]
F8	40	ATO, Brake booster
F9	15	ATO, Horn relay
F10	30	ATO, Windscreen wiper motor relay 1 / Windscreen wiper motor relay 2 / Windscreen wiper motor
F11	–	–
F12	15	ATO, Mechatronic unit DSG gearbox [Optional]
F13	25	ATO, ABS control unit
F14	20	ATO, Additional heater control unit [Optional]
F15	40	ATO, ABS control unit
F16	–	–
F17	40	MAXI, Heating element for additional air heater [for vehicles with diesel engines]
F18	40	MAXI, Heating element for additional air heater [for vehicles with diesel engines]
F19	–	–
F20	–	–
F21	7,5	ATO, Engine control unit
F22	30	Starter
F23	15	ATO, Engine control unit
F24	7,5	ATO, [for vehicles with diesel engines] Oil level and temperature sensor [for vehicles with diesel engines] / Fuel pump relay [for vehicles with diesel engines] / Activated carbon filter solenoid valve 1 [for vehicles with diesel engines] / Exhaust camshaft adjuster valve 1 [for vehicles with diesel engines] / Oil pressure regulating valve [for vehicles with diesel engines] / Inlet camshaft adjuster cylinder 2 [for vehicles with diesel engines] / Exhaust camshaft adjuster cylinder 2 [for vehicles with diesel engines] / Inlet camshaft adjuster cylinder 3 [for vehicles with diesel engines] / Exhaust camshaft adjuster cylinder 3 [for vehicles with diesel engines] / Inlet camshaft adjuster valve 1 [for vehicles with diesel engines] / Radiator fan [for vehicles with diesel engines]
F24	10	ATO, for cars with a gasoline engine] Oil level and temperature sender [for cars with a gasoline engine] / Glow plug control unit [for cars with a gasoline engine] / Reducing agent preheating control unit [for cars with a gasoline engine] / Reducing agent metering system relay [for cars with a gasoline engine] / Fuel pressure regulator [for cars with a gasoline engine] / Fuel metering valve [for cars
F25	7,5	ATO, Injector cylinder 1 / Injector cylinder 2 / Injector cylinder 3 / Injector cylinder 4
F26	10	ATO, Crankcase ventilation heating resistor [for vehicles with diesel engines] / Oil pressure regulating valve [for vehicles with diesel engines] / Coolant regulating valve [for vehicles with diesel engines] / Piston cooling nozzle control valve [for vehicles with diesel engines] / Heater circulation pump [for vehicles with diesel engines] / Charge air cooling pump [for cars with a gasoline engine] /
, F27	10	ATO, [for cars with a gasoline engine] Lambda probe 1 after neutralizer [for cars with a gasoline engine] / Lambda probe 1 before neutralizer [for cars with a gasoline engine]
F27	15	ATO, [for vehicles with diesel engines] Soot Particle Sensor [for vehicles with diesel engines] / NOx Sensor 3 [for vehicles with diesel engines] / Lambda Probe 1 Before Catalytic Converter [for vehicles with diesel engines] / NOx Sensor Control Unit [for vehicles with diesel engines] / NOx Sensor Control Unit 2 [for vehicles with diesel engines]
F28	20	ATO, Ignition coil 1 with output stage [for cars with a gasoline engine] / Ignition coil 2 with output stage [for cars with a gasoline engine] / Ignition coil 3 with output stage [for cars with a gasoline engine] / Ignition coil 4 with output stage [for cars with a gasoline engine]
F29	15	ATO, [for cars with a gasoline engine] Fuel pump control unit / Fuel delivery module
F29	20	ATO [for vehicles with diesel engines]
F30	–	–
F31	7,5	ATO, brake light sensor
F32	–	–
F33	40	MAXI, Heating element for additional air heater [for vehicles with diesel engines]
F34	30	ATO, Heated windscreen relay [for cars with heated windshield] / Windscreen heating element [for cars with heated windshield] / Relay 2 for heated windscreen [for cars with heated windshield]
F35	30	Relay 2 for heated windscreen [for cars with heated windshield] / Windscreen heating element [for cars with heated windshield]
R1		Main relay [for cars with petrol engines], Power supply relay terminal 30 [for cars with diesel engine]
R2		High Power Heating Relay
R3		Horn relay
R4		Starter relay 1
R5		Starter relay 2
R6		Fuel pump relay/ Gas shut-off valve relay [with engine letter designation DHFA]
R7		Glow plug control unit [for cars with diesel engine]
R8		Low power heating relay [for vehicles with additional air heater heating element]
R9		Heated windscreen relay
R10		Relay 2 for heated windscreen
R11		Relay 1 windscreen wiper motor
R12		Windscreen wiper motor relay 2

Fuses for junction box 1 (SX1)

Assignment of the fuses in the juncion box 1 (SX1)

Type	No.	Function/component
Battery Terminal	SA1	Fuse box B
Battery Terminal	SA2	Radiator Fan [for vehicle with a simple radiator fan]
Battery Terminal	SA2	Radiator Fan [for vehicle with dual radiator fan]
Battery Terminal	508	Switching and distribution box 2/ Battery
Battery Terminal	SA4	Fuse box C
Battery Terminal	SA5	Fuse box C

Fuses for junction box 2 (SX2)

Assignment of the fuses in the juncion box 2 (SX2)

Type	No.	Function/component
MIDI	A	Starter/ Generator with voltage regulator
MIDI	B	Relay and fuse block J for special vehicle [for cars with preparation for a 2nd battery]

There are also videos on this topic on our YouTube channel.

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Volkswagen Caddy (SB; 2021 – 2023) – fuse and relay box diagram

Posted on 28 August 202528 August 2025 by admin

Volkswagen Caddy (SB; 2021 – 2023) – fuse and relay box diagram

Year of production: 2021, 2022, 2023

Passenger Compartment

Fuse box diagram

Assignment of the fuses in the passenger compartment

No.	A	Function/component
F1	–	–
F2	30	ATO, Rear fresh air control unit
F3	25	ATO, Trailer control unit, left (vehicles with factory-fitted towing bracket)
F4	30	ATO, Control unit for reduction agent heating [for vehicle with diesel engines]
F5	25	ATO, Parking lock actuator
F6	30	ATO, Interior lighting, On-board power supply control unit
F7	30	ATO, Seat heating, Heating and air conditioning control unit
F8	25	ATO, Control unit for special vehicles (depending on the equipment)
F9	30	ATO, Driver’s door control unit [for vehicle with left-hand steering], Front passenger’s door control unit [for vehicles with right-hand steering]
F10	25	ATO, Control unit for special vehicles
F11	15	ATO, Trailer recognition control unit (vehicles with factory-fitted towing bracket)
F12	40	MAXI+, Right exterior lighting, On-board power control supply control unit
F13	40	MAXI+, Central locking, On-board power control supply control unit
F14	40	MAXI+, Interior with socket, 12V/230V
F15	–	–
F16	7,5	MINI, Airbag control unit, Seat occupied sensor radio communication control unit
F17	10	MINI, Relay for reducing agent dosing system [for vehicles with diesel engines] / Supply module of the reducing agent dosing system [for vehicles with diesel engines] / Recovery tank [for vehicles with diesel engines]
F18	10	MINI, Electronic steering column lock control unit / Access and start authorization interface / Anti-theft alarm control unit 2 / Anti-theft alarm control unit 3 / Anti-theft alarm control unit 4 / Anti-theft alarm control unit 5
F19	7,5	MINI, Instrument cluster / Control unit for emergency call module and communication unit
F20	7,5	MINI, Telephone, Storage compartment with mobile phone interface / Transmission and reception stabilization control unit / USB port 1
F21	7,5	MINI, Interior lighting relay / Blind spot monitoring control unit / Blind spot monitoring control unit 2 / Around view camera rear view
F22	–	–
F23	15	MINI, Contact plate in left B-pillar
F24	15	MINI, All-wheel drive control unit
F25	25	ATO, Control unit for special vehicles
F26	30	ATO, Front passenger door control unit
F27	25	ATO, Control unit for special vehicles
F28	–	–
F29	15	ATO, Trailer charging cable ( vehicles with factory-fitted towing bracket)
F30	20	ATO, Infotainment components, Electronic information system control unit 1
F31	25	ATO, trailer control unit, right (vehicles with factory-fitted towing bracket)
F32	15	ATO, Rear lid control unit
F33	15	ATO, Contact plate in right B-pillar
F34	–	–
F35	40	MAXI+, Left exterior lighting, On-board power supply control unit
F36	40	MAXI+, Blower regulator, Supply air fan control unit
F37	–	–
F38	–	–
F39	–	–
F40	7,5	MINI, anti-theft alarm
F41	7,5	MINI, Data bus diagnostic interface
F42	7,5	MINI, Selector lever / Selector lever position indicator
F43	10	MINI, Heating and air conditioning control unit / Interior temperature sensor / Rear window heating relay / Tyre pressure monitoring control unit / Auxiliary heater radio signal receiver
F44	7,5	MINI, Electromechanical parking brake button / Dash panel switch module, center / Light control panel / Anti-theft alarm sensor / Air humidity, rain and light sensor / Front interior light
F45	7,5	MINI, Steering column electronics control unit
F46	7,5	MINI, Display for front control, display and information unit
F47	–	–
F48	7,5	USB charging socket 1 [Optional]
F49	–	–
F50	–	–
F51	–	–
F52	20	ATO, Cigarette lighter [Optional][5] / 12V socket [Optional][5] / 12V socket 3 [Optional][5] / 12V socket 4 [Optional][5]
F53	–	–
F54	–	–
F55	–	–
F56	–	–
F57	–	–
F58	7,5	MINI, Adaptive cruise control unit [Optional] / Parking assistance control unit [Optional] / Front camera for driver assistance systems [Optional]
F59	7,5	MINI, Electromechanical parking brake button / Reversing light switch [Optional] / Refrigerant circuit pressure sensor / Socket relay
F60	7,5	MINI, Diagnostic connector
F61	7,5	MINI, Clutch pedal position sensor [Optional] / Starter relay 1 / Starter relay 2
F62	–	–
F63	–	–
F64	–	–
F65	–	–
F66	15	ATO, Rear window wiper.
F67	30	MAXI+, Rear window heating
R1		Socket relay
R2		Power supply relay terminal 15
R3		Rear window heating relay
R4		Relay for reducing agent dosing system [for cars with diesel engine]

Engine Comparment

Fuse box diagram

Assignment of the fuses in the engine compartment

No.	A	Function/component
F1	80	MIDI, Power steering control unit
F2	7,5	ATO, ABS control unit / Main relay [for cars with a gasoline engine] / Terminal 30 power supply relay [for vehicles with diesel engines] / Engine control unit
F3	–	–
F4	15	ATO, Headlight front left
F5	15	ATO, Headlight front right
F6	–	–
F7	30	ATO, Gearbox oil cooling pump [Optional]
F8	40	ATO, Brake booster
F9	15	ATO, Horn relay
F10	30	ATO, Windscreen wiper motor relay 1 / Windscreen wiper motor relay 2 / Windscreen wiper motor
F11	–	–
F12	15	ATO, Mechatronic unit DSG gearbox [Optional]
F13	25	ATO, ABS control unit
F14	20	ATO, Additional heater control unit [Optional]
F15	40	ATO, ABS control unit
F16	–	–
F17	40	MAXI, Heating element for additional air heater [for vehicles with diesel engines]
F18	40	MAXI, Heating element for additional air heater [for vehicles with diesel engines]
F19	–	–
F20	–	–
F21	7,5	ATO, Engine control unit
F22	30	Starter
F23	15	ATO, Engine control unit
F24	7,5	ATO, [for vehicles with diesel engines] Oil level and temperature sensor [for vehicles with diesel engines] / Fuel pump relay [for vehicles with diesel engines] / Activated carbon filter solenoid valve 1 [for vehicles with diesel engines] / Exhaust camshaft adjuster valve 1 [for vehicles with diesel engines] / Oil pressure regulating valve [for vehicles with diesel engines] / Inlet camshaft adjuster cylinder 2 [for vehicles with diesel engines] / Exhaust camshaft adjuster cylinder 2 [for vehicles with diesel engines] / Inlet camshaft adjuster cylinder 3 [for vehicles with diesel engines] / Exhaust camshaft adjuster cylinder 3 [for vehicles with diesel engines] / Inlet camshaft adjuster valve 1 [for vehicles with diesel engines] / Radiator fan [for vehicles with diesel engines]
F24	10	ATO, for cars with a gasoline engine] Oil level and temperature sender [for cars with a gasoline engine] / Glow plug control unit [for cars with a gasoline engine] / Reducing agent preheating control unit [for cars with a gasoline engine] / Reducing agent metering system relay [for cars with a gasoline engine] / Fuel pressure regulator [for cars with a gasoline engine] / Fuel metering valve [for cars
F25	7,5	ATO, Injector cylinder 1 / Injector cylinder 2 / Injector cylinder 3 / Injector cylinder 4
F26	10	ATO, Crankcase ventilation heating resistor [for vehicles with diesel engines] / Oil pressure regulating valve [for vehicles with diesel engines] / Coolant regulating valve [for vehicles with diesel engines] / Piston cooling nozzle control valve [for vehicles with diesel engines] / Heater circulation pump [for vehicles with diesel engines] / Charge air cooling pump [for cars with a gasoline engine] /
, F27	10	ATO, [for cars with a gasoline engine] Lambda probe 1 after neutralizer [for cars with a gasoline engine] / Lambda probe 1 before neutralizer [for cars with a gasoline engine]
F27	15	ATO, [for vehicles with diesel engines] Soot Particle Sensor [for vehicles with diesel engines] / NOx Sensor 3 [for vehicles with diesel engines] / Lambda Probe 1 Before Catalytic Converter [for vehicles with diesel engines] / NOx Sensor Control Unit [for vehicles with diesel engines] / NOx Sensor Control Unit 2 [for vehicles with diesel engines]
F28	20	ATO, Ignition coil 1 with output stage [for cars with a gasoline engine] / Ignition coil 2 with output stage [for cars with a gasoline engine] / Ignition coil 3 with output stage [for cars with a gasoline engine] / Ignition coil 4 with output stage [for cars with a gasoline engine]
F29	15	ATO, [for cars with a gasoline engine] Fuel pump control unit / Fuel delivery module
F29	20	ATO [for vehicles with diesel engines]
F30	–	–
F31	7,5	ATO, brake light sensor
F32	–	–
F33	40	MAXI, Heating element for additional air heater [for vehicles with diesel engines]
F34	30	ATO, Heated windscreen relay [for cars with heated windshield] / Windscreen heating element [for cars with heated windshield] / Relay 2 for heated windscreen [for cars with heated windshield]
F35	30	Relay 2 for heated windscreen [for cars with heated windshield] / Windscreen heating element [for cars with heated windshield]
R1		Main relay [for cars with petrol engines], Power supply relay terminal 30 [for cars with diesel engine]
R2		High Power Heating Relay
R3		Horn relay
R4		Starter relay 1
R5		Starter relay 2
R6		Fuel pump relay/ Gas shut-off valve relay [with engine letter designation DHFA]
R7		Glow plug control unit [for cars with diesel engine]
R8		Low power heating relay [for vehicles with additional air heater heating element]
R9		Heated windscreen relay
R10		Relay 2 for heated windscreen
R11		Relay 1 windscreen wiper motor
R12		Windscreen wiper motor relay 2

Fuses for junction box 1 (SX1)

Assignment of the fuses in the juncion box 1 (SX1)

Type	No.	Function/component
Battery Terminal	SA1	Fuse box B
Battery Terminal	SA2	Radiator Fan [for vehicle with a simple fan]
Battery Terminal	SA2	Radiator Fan [for vehicle with dual radiator fan]
Battery Terminal	508	Switching and distribution box 2/ Battery
Battery Terminal	SA4	Fuse box C
Battery Terminal	SA5	Fuse box C

Fuses for junction box 2 (SX2)

Assignment of the fuses in the juncion box 2 (SX2)

Type	No.	Function/component
MIDI	A	Starter/ Generator with voltage regulator
MIDI	B	Relay and fuse block J for special vehicle [for cars with preparation for a 2nd battery]

There are also videos on this topic on our YouTube channel.

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Volkswagen Caddy (IV; 2015 – 2020) – fuse and relay box diagram

Posted on 27 August 202527 August 2025 by admin

Volkswagen Caddy (IV; 2015 – 2020) – fuse and relay box diagram

Year of production: 2015, 2016, 2017, 2018, 2019, 2020

The fourth-generation Volkswagen Caddy was produced from 2015 to 2020. In this guide, you will find descriptions of the fuses and relays for the Volkswagen Caddy 4 (2015 – 2020 models), including fuse box diagrams, their locations.

Passenger Compartment

Fuse box location

The interior fuse box is located at the bottom of the dashboard, behind a protective cover.

Fuse box diagram

Assignment of the fuses in the passenger compartment

No.	A	Function/component
1	–	–
2	–	–
3	–	–
4	–	–
5	–	–
6	–	–
7	–	–
8	–	–
9	10	10-pin connector, pin 4 (interface for special functions)
10	8	Diagnostic data bus interface. Engine control unit. Starter relay 1. Starter relay 2.
11	5	Parking assistance system control unit unit. Power steering control unit
12	5	Taximeter. Taximeter mirror.
12	20	8-pin connector, pin 8; 28-pin connector, pin 20
13	7,5	Headlight range – adjustable. Button for disabling ASR and electronic stability control. Selector lever. Tire pressure indicator button. Start/stop button. ABS control unit. Trailer detection control unit. ACC control unit. Four-wheel drive control unit. Power steering control unit. DSG transmission mechatronic control unit. Inverter with 12 V/230 V socket. Range control motor for left headlamp. Right headlamp range control motor.
14	10	Reverse light switch. Mass air flow sensor. Auxiliary heater switch relay. Control unit in instrument cluster. Crankcase ventilation heater resistor. Diagnostic connector. 1-pole connector, pin sixteen
15	5	Airbag control unit. Front passenger airbag deactivation indicator.
16	5	Lighting switch. Heating and mode selection switch. High pressure sensor. Atmospheric pollution sensor sensor. Temperature and oil level sensor. Light sensor. High beam assistant control unit. Front driver assistance camera. Anti-glare interior mirror.
17	–	–
18	10	10-pin connector, pin 6 (interface for special functions)
19	10	Taximeter. Mirror with taximeter. Walkie-talkie. Printer.
19	10	10 pin connector, pin 7 (interface for special functions)
20	20	Volkswagen Caddy 4 cigarette lighter fuse. 12 V connector, in the storage compartment
21	10	Heating and mode selection operation. Selector lever. Rear window heater relay. Rear window heater relay relay. Climatronic control unit. Air conditioning control unit. Emergency data recorder. (except special equipment for police). Reducing agent dosing system relay. Dual-band cell phone signal amplifier. Radio signal receiver for auxiliary water heater. Bluetooth cell phone antenna. 6-pin connector, 2-pin connector (special police equipment only). Diagnostic connector. 16-pin connector, pin 16
21	10	Light switch. Heating and heating mode selection switch. Selector switch. Ambient light switch in rear cowl (Camper). Illumination 1 in the tailgate. Illumination 2 in the tailgate. Rain and light sensor. Rear window heater relay. Climatronic control unit. Air conditioning control unit. Horn relay. Emergency data recorder. (Except special equipment for police). Reducing agent. Dosing system relay. 16-pole diagnostic connector, pin 16. Rear interior light (Camper). Illumination 1 in rear of hood. Illumination 2 in the rear of the hood. Rear reversing camera.
22	10	On-board network control unit. Lighting in the passenger compartment. Trunk light. Glove compartment light. Center cabin light. Rear interior light. Backlight 1 in tailgate (special equipment). Backlight 2 in tailgate (special equipment). Trunk light 2 (special equipment). Front left reading light. Front right reading light. Rear left reading lamp 2. Rear right reading light 2. On-board network control unit. Left fog lamp bulb. Right fog lamp bulb.
23	5	[Special vehicles] Taxi – interior light switch. Cab signal switch. 10-pin connector, pin 1 (interface for special functions)
23	10	[special vehicles] Direction indicator relay.
24	5	Interior condition monitoring sensor. Vehicle tilt sensor. Anti-theft alarm sensor. Alarm. on-board network control unit
25	5	Instrument panel. Control unit in the instrument cluster
26	10	Button for emergency data recorder (without special police equipment); Emergency data recorder (without special police equipment)
27	–	–
28	–	–
29	15	Rear wiper motor.
30	–	–
31	5	Heater operating mode switch. Heating resistor for left windshield washer nozzle. Heating resistor for right windshield washer nozzle.
32	–	–
33	40	Auxiliary heater switch relay ( vehicles with auxiliary heater, without R1234yf refrigerant); Heating mode switch. Air conditioner control unit. Auxiliary heater switch relay (cars with auxiliary heater, with R1234yf refrigerant); Fresh air fan cut-off relay. Heating mode switch. Air conditioner control unit. Outside air fan isolation relay (vehicles without auxiliary heater, with R1234yf refrigerant); Air conditioner control unit.
34	–	–
35	–	–
36	–	–
37	–	–
38	–	–
39	30	4-pin connector, pin 1 [special vehicles].
40	20	Trailer detection control unit.
41	20	Trailer detection control unit.
42	20	Trailer detection control unit.
43	15	Fuel pump relay (Caddy gasoline pump fuse). Fuel pump. High pressure fuel supply relay. Additional fuel pump. Electric fuel pump relay 2.
43	20	[Euro 6 diesel engine] – Fuel pump relay. Electric fuel pump relay 2. Fuel pump.
44	40	Fresh air blower control unit. Fresh air blower.
45	20	Headlight washer relay. Headlamp washer pump.
46	10	Driver’s door control unit. (models without power windows), left-hand drive vehicles / Passenger door control unit. models without power windows), right-hand drive vehicles
46	30	Driver door control unit (models with power windows), left-hand drive vehicles / Passenger door control unit (models with power windows), right-hand drive vehicles
47	40	X relay relay relay contact, fuse box C in the passenger compartment.
48	30	Front seat heating control unit.
49	10	Driver door control unit (models without power windows), right-hand drive vehicles / Passenger door control unit (models without power windows), left-hand drive vehicles
49	30	Driver door control unit (models with power windows), right-hand drive vehicles / Passenger door control unit (models with power windows), left-hand drive vehicles
50	20	On-board network control unit. Windshield washer pump. Rear wiper motor. Windshield and rear window washer pump.
51	15	Trailer power relay. TCU connector.
51	30	10-pin connector, pin 4 / 10-pin connector, pin 5 [special vehicles].
52	25	Rear window defroster relay. Rear window defroster resistor. Left hinged door rear window defroster resistor. Right hinged door rear window defroster resistor. Fresh air fan relay (vehicles with auxiliary heater). Ballast resistor for fresh air fan with overheating protection. Fresh air blower.
53	20	12V outlet – rear in center console; 12V outlet in left rear side panel.
54	15	Roof fan switch relay 1. [special vehicles].
55	15	8-pin connector, pin 4 [special cars]
56	30	Inverter with socket, 12V/230V.
57	–	–
58	–	–
59	5	Radio switch. Engine boost switch. Daytime running lights switch. Emergency data logger.
60	30	3-pin connector, pin 1 [special vehicles].

Engine Comparment

Fuse box location

In the engine bay, the fuse and relay box is positioned next to the battery and protected by a cover.

Fuse box diagram

Assignment of the fuses in the engine compartment

No.	A	Function/component
1	30	Gearbox heating control unit
2	–	–
3	5	Battery condition monitoring control unit, board power control unit
4	20	ABS control unit, ABS hydraulic unit
5	15	DSG transmission mechatronic unit (02E) with 20-pin connector
5	30	DSG transmission mechatronic unit (0AM) with 25-pin connector
6	5	Before May 2017: Instrument cluster control unit, Steering column electronics control unit; From June 2017 [For left-hand drive vehicles]: Light switch, Trunk lid illumination switch (Camper), Trunk lid illumination 1, Trunk lid illumination 2, Rain and light sensor, Horn relay, Instrument cluster control unit, Steering column electronics control unit, Emergency call module and communication control unit, Reverse camera, Rear interior light (Camper), Rear lid illumination 1, Rear lid illumination 2; From June 2017 [For right-hand drive vehicles]: Control unit in instrument cluster, Electronic steering column control unit, Dual-band cell phone signal booster, Bluetooth cell phone antenna.
7	40	Power relay terminal 15: Interior fuse box (#9 – #16 and #25 – #27)
8	15	Control unit with display for radio with navigation, control unit 1 for information electronics, radio, USB hub
9	20	Wheel drive control unit
10	5	Engine control unit, main relay [gasoline engine], power relay terminal 30 [diesel engine]
11	20	Auxiliary heater control unit
12	5	Diagnostic data bus interface
13	15	Engine control unit [Petrol engine]
13	30	Engine control unit [Diesel engine]
14	10	[Diesel engine, complies with Euro 6 emission standard]: Inlet camshaft adjustment valve 1, Fuel pressure regulator, Fuel metering valve
14	15	[Diesel engine, compliant with Euro 5, Euro 4 emission class]: Fuel pressure regulator, Fuel metering valve
14	20	Ignition coil, Ignition coil 1, 2, 3 and 4 with output stage
15	5	Fuel pump relay, Electric fuel pump relay 2, Glow plug control unit; [Diesel engine complying with Euro 5, Euro 4 emission class]: Low output heater relay, High output heater relay
15	10	Lambda probe heating element, Lambda probe heating element 1 after catalytic converter
15	15	[Diesel engine compliant with Euro 6 emission standard]: Low output thermal relay, High output thermal relay; NOx sensor control unit, NOx sensor control unit 2, Lambda probe heating element; Injectors for cylinders 1, 2, 3 and 4 [Petrol engine 1.6L].
16	30	On-board network control unit, Front right headlamp, Right headlamp discharge lamp control unit, Right daytime running lamps and front side lamps control unit, Right headlamp bulb for adaptive lighting system, Left fog lamp or right fog lamp bulb, Right daytime running lamps bulb, Front left lamp, Rear right lamp, Front right lamp, Rear left turn signal lamp, Front right turn signal lamp, Left brake light bulb, Right reversing light bulb, Left turn signal lamp, Left turn signal repeater bulb, High beam bulb, Right low beam bulb, Right high beam bulb, Right high beam bulb
17	15	Horn relay: High tone signal
18	30	Control unit for special vehicles
19	30	Windshield wiper motor control unit: Windshield wiper motor
20	10	Shut-off and safety valve 1, 2, 3, 4 and 5 for gas cylinder
21	10	[Diesel engine, complies with Euro 6 emission standard]: Fuel pump relay, glow plug control unit; lambda probe heating element [Diesel engine, complies with Euro 5, Euro 4 emission standards].
21	15	Fuel pump control unit [Gasoline engine]; [Gasoline engine 1.6 l]: Lambda probe heater, Lambda probe heater 1 after catalytic converter
21	30	[Gasoline engine 1.0 l]: Fuel pump control unit, Brake system vacuum pump
22	5	Brake light switch, Clutch pedal position sensor
23	15	Mass air meter, Charge pressure control solenoid valve, EGR cooler switch valve, Oil pressure control valve, Cylinder head cooling circuit valve, Gas cut-off valve relay, High pressure valve for gas operation, Charge air cooling pump
23	15	Fuel pressure regulator, Charge air cooling pump
24	10	Radiator fan: Radiator fan control unit; Relay for reducing agent metering system: Reducer level sensor, Recovery pump, Reducer return pump; Canister solenoid valve 1, Intake camshaft adjustment valve 1, Exhaust camshaft adjustment valve 1, Gas injection valve 1, 2, 3 and 4, Oil pressure adjustment valve, Coolant circulation pump 2, Charge air cooling pump, Heater circulation pump
25	60	ABS control unit, ABS hydraulic pump
26	30	On-board power control unit, Front left headlight, Adaptive lighting system left headlight bulb, Left headlight discharge lamp control unit, Left daytime running lamps and front side headlamps control unit, Left fog lamp bulb or right fog lamp bulb, Left daytime running lamps bulb, Front right lamp bulb, Left rear lamp bulb, Front left turn signal lamp, Rear right turn signal lamp, Right brake light bulb, Left reversing light bulb, Right turn signal repeater bulb, Left low beam bulb, Left high beam bulb, Left low beam bulb, Left high beam bulb, Left low beam headlamp flap
27	50	Glow plug control unit
28	40	Fuse 56 in the passenger compartment fuse box, Inverter with 12V/230V socket
28	60	Windshield heater relay: Windshield heater element
29	30	Special vehicles: Fuse 18 and 19 in the passenger compartment fuse box
29	50	Special vehicles: Fuse 39 in the passenger compartment fuse box, Fuse 51 in the passenger compartment fuse box, Fuses 54 and 55 in the passenger compartment fuse box, Fuses 59 and 60 in the passenger compartment fuse box
30	50	Trailer Driving: Fuse 40, 41 and 42 in the passenger compartment fuse box
R1		Main relay, Power relay terminal 30
R2		Gas shutoff valve relay
SA1	200	Alternator (110A); Alternator (140A/180A)
SA1	400	Alternator (140A/180A)
SA2	80	Power steering control unit: Power steering motor
SA3	50	Radiator fan: Radiator fan control unit, radiator fan, radiator fan 2
SA4	80	Contact relief relay X [Cars without Climatronic only]: Interior fuse box: No. 20 – No. 24 and No. 43 – No. 53
SA5	80	Interior fuse box: No. 20 – No. 24 and No. 43 – No. 53
SA6	40	Low power heating relay: Heating element for auxiliary air heater
SA7	80	High power heating relay: Heating element for auxiliary air heater
TV2		Protection of all circuits in underhood block

There are also videos on this topic on our YouTube channel.

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Buick Enclave (II; 2025) – fuse and relay box diagram

Posted on 21 August 202521 August 2025 by admin

Buick Enclave (II; 2025) – fuse and relay box diagram

Year of production: 2025

The Buick Enclave from model years 2018 to 2021 is part of the second generation of this midsize luxury SUV, which saw a significant redesign in 2018.

In this guide, we focus on the second-generation Buick Enclave, manufactured 2025. Inside, you’ll find fuse box diagrams for the 2025 models, details on the locations of the fuse panels within the vehicle, and explanations of each fuse and relay assignment (fuse layout)

Passenger compartment

Fuse Box Location

Fuse Box Diagram

Buick Enclave (II; 2025) - fuse and relay box diagram - passenger compartment — Buick Enclave (II; 2025) – fuse and relay box diagram – passenger compartment

Assignment of the fuses in the passenger compartment

№	Description
F1	Blower motor
F2	ELM 1 – Exterior Lighting Module 1
F3	SCL Steering Column Lock
F4	ELM 2 – Exterior Lighting Module 2
F5	CM 2 – Body Control Module 2
F6	OHC – OnStar Hands-Free Calling
F7	Steering wheel control
F8	Telematics
F9	BCM BATT 1 & ETS SHIFTER – Body Control Module Battery 1 and Euro Truck Shnifer
F10	UGDO – Universal Garage Door Opener
	Spare
F11	HVAC & TPIM – Heating, Ventilation and Air Conditioning and Traction Power Inverter Module
F12	Sterring Column Lock
F13	CGM & DLC – Central Gateway Module and Data Link Connector
F14	EBCM & PCM – Electronic Brake Control Module and Power Control Module
F15	AUX DISPLAY
F16	APO_RR_CARGO – Auxiliary Power Outlet Rear Cargo
F17	SDM_AOS – Sensing Diagnostic Module Automatic Occupant Sensor
	Spare
F18	SEAT FAN CTR/ HDLP CO & DR – Seat Fan Control Headlamo CO and Driver
F19	ELM RC – Exterior Lighting Module Ride Control
F20	VKM – Virtual Key Module
	Spare
F21	VCU_BATT 1 & 2 – Virtual Cocpit Unit Battery 1 and 2
F22	SDM – Sensing Data Module
F23	—
F43	WCM – Wireless Charging Module
F25	HVPO – High Voltage Power Outlet
F26	Spare
F27	AUX
F28	LRR – Long Range Radar
F29	SRR – Short Range Radar
F30	—
F31	BCM 3 – Body Control Module 3
F32	HSWM – Heated Steering Wheel Module
F33	—
F34	CPM – Column Position Module
F35	AMPLIFIER
F36	DC/ DC BATT 2 – Direct Current / Direct Current Battery 2
F37	BCM 4 – Body Control Module 4
F38	AMPLIFIER 2
F39	ELM 6 – Exterior Lighting Module 6
F40	DCAC – Direct Current Alternating Current
F41	—
F42	Auxiliary power outlet (CB)/ Lighter (Minifuse)

Engine compartment

Fuse Box Location

Fuse Box Diagram

Buick Enclave (II; 2025) - fuse and relay box diagram - engine compartment — Buick Enclave (II; 2025) – fuse and relay box diagram – engine compartment

Assignment of the fuses in the engine compartment

№	Description
F1	Spare
F2	Spare
F3	FRT_WIPER – Front Wiper
F4	Spare
F5	Spare
F6	HDLP RT – Headlamp Right
F7	RR_WIPER – rear Wiper
F8	Spare
F9	RR DEFOG – Rear Defog
F10	ELM 4 – Exterior Lighting Module 4
F11	HDLP LT – Headlamp Left
F12	HORN
F13	Spare
F14	Spare
F15	Spare
F16	RR_WPR_CTRL – Rear Wiper Control
F17	RLY COIL GND – Relay Coil Ground
F18	DC DC BATT1 – Direct Current Direct Current Battery 1
F19	ELM7 – Exterior Lighting Module 5
F20	Spare
F21	Spare
F22	ELM_5 – Exterior Lighing Module 5
F23	WIPER_DE_ICE
F24	EBCM1 – Electronic Brake Control Module 1
F25	ELM_3 – Exterior Lighting Module 3
F26	Spare
F27	TRLR_LTP_TRN_LT – Trailer Lamp Turn Left
F28	TRLR_LTP_TRN_RT – Trailer Lamp Turn Right
F29	WASH
F30	AERO SHUTTER
F31	Spare
F32	PCM – Power Control Module
F33	Spare
F34	Spare
F35	PCM – Power Control Module
F36	STRTR MTR – Starter Motor
F37	AC CLUTCH GAS – Alternating Current Clutch Gas
F38	SOL CP_TURBO BYPASS – Solenoid Turbo Bypass
F39	COIL ODD
F40	Spare
F41	B721_B70_M674
F42	Spare
F43	Spare
F44	Spare
F45	Spare
F46	Spare
F47	Spare
F48	Spare
F49	Spare
F50	E-PHASER – Electronic Phaser
F51	Spare
F52	PCM – Power Control Module 2
F53	Spare
F54	AIR_PUMP
F55	Spare
F56	STRTR PINION – Starter Pinion
F57	WATER PUMP

Luggage compartment

Fuse Box Location

Fuse Box Diagram

Buick Enclave (II; 2025) - fuse and relay box diagram - luggage compartment — Buick Enclave (II; 2025) – fuse and relay box diagram – luggage compartment

Assignment of the fuses in the luggage compartment

№	Description
F1	RR_BLOW – Rear Blow
F2	DSP_CODR – Door Switch Panel_Code
F3	TAILGATE
F4	TRLR_BAT1 – Trailer Battery 1
F5	ACP2 – AWD Control Processor 2
F6	PWR_FOLD_SEAT_L_R – Power Fold Seat Left and Rear
F7	DSP-DOOR Switch Panel
F8	Spare
F9	LAMPS_RT-Right Lamps
F10	Spare
F11	Spare
F12	ELM 2 – Exterior Lighting Module 2
F13	LAMPS_LT – Left Lamps
F14	SP_DRVR – Driver
F15	MSM_DRIVER – Memory Seat Module Driver
F16	MTR PFTS_ROW2_L
F17	FRT – Front
F18	SBP_CO_DRIVER
F19	MTR PFTS_ROW2_R
F20	Spare
F21	RFA-Remote Function Actuator
F22	Spare
F23	Spare
F24	Spare
F25	Spare
F26	CANISTER
F27	UPA – Universal Park Assist
F28	RDCM – Right Door Conrol Module
F29	SBZA – Side Blind Zone Assist
F30	TRLR_PRK_LMP – Trailer Park Lamp
F31	FCM – Front Camera Module
F32	Spare
F33	ROW2_BAT1 – Second Row Battery 1
F34	Spare
F35	Spare
F36	ROW2_BAT2 – Second Row Battery 2
F37	Spare
F38	Spare
F39	Spare
F40	TRLR_BACK_UP
F41	Spare
F42	DSP-DOOr Switch Panel
F43	POWER FOLD SEAT SW/N 3_ROW
F44	OUT_OF_PARK_DISABLE
F45	TRAILER_BRAKE
F46	ACP3-AWD Control Processor 3
F47	FTZM – Fuel Tank Zone Module
F48	SP_PASS
F49	Spare
F50	ELM 1 – Exterior Lighting Module 1
F51	FRT_BAT2 – Front Battery 2
F52	Spare
F53	Spare
F54	ROW2_FOLD_RH – Second Row Righthand Fold
F55	ROW3 – Thrid Row
F56	SUNROOF
F57	RDCM – Right Door Control Module

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Buick Enclave (II; 2022 – 2024) – fuse and relay box diagram

Posted on 19 August 202519 August 2025 by admin

Buick Enclave (II; 2022 – 2024) – fuse and relay box diagram

Year of production: 2022, 2023, 2024

The Buick Enclave from model years 2018 to 2021 is part of the second generation of this midsize luxury SUV, which saw a significant redesign in 2018.

In this guide, we focus on the second-generation Buick Enclave, manufactured between 2022 and 2024. Inside, you’ll find fuse box diagrams for the 2022, 2023 and 2024 models, details on the locations of the fuse panels within the vehicle, and explanations of each fuse and relay assignment (fuse layout)

Passenger compartment

Fuse Box Location

Fuse Box Diagram

Buick Enclave (II; 2022 - 2024) - fuse and relay box diagram - passenger compartment — Buick Enclave (II; 2022 – 2024) – fuse and relay box diagram – passenger compartment

Assignment of the fuses in the passenger compartment

№	Description
F1	Body control module 6
F2	Diagnostic link
F3	Electric steering column lock
F4	Rear USB port
F5	Rear sunshade / Park/Reverse/Neutral/Drive/Low
F6	Heating, ventilation, and air conditioning
F7	Body control module 3
F8	Adaptive front lighting system
F9	Right front heated seat
F10	Airbag
F11	—
F12	Amplifier
F13	Body control module 7
F14	Left front heated seat
F15	—
F16	Sunroof
F17	Communication gateway module
F18	Instrument cluster / Head-up display
F19	Body control module 1
F20	Wireless charger module
F21	Body control module 4
F22	Infotainment
F23	Body control module 2
F24	Park/Reverse/Neutral/Drive/Low
F25	Park assist/Shifter interface board
F26	Communications integration module
F27	Video
F28	Radio/Heating, ventilation, and air conditioning display
F29	Radio
F30	Steering wheel controls
F31	Front blower
F32	DC AC inverter
F33	Driver power seat
F34	Passenger power seat
F35	Feed/Body control module 4
F36	Electric power steering
F37	Power outlet/ Wireless charger/ Accessory
F38	Body control module 8
F39	—
F40	—
F41	—
F42	Auxiliary power outlet (CB)/ Lighter (Minifuse)

Engine compartment

Fuse Box Location

Fuse Box Diagram

Buick Enclave (II; 2022 - 2024) - fuse and relay box diagram - engine compartment — Buick Enclave (II; 2022 – 2024) – fuse and relay box diagram – engine compartment

Assignment of the fuses in the engine compartment

№	Description
F1	Antilock brake system pump
F2	Starter 1
F3	DC DC transformer 1
F4	—
F5	DC DC transformer 2
F6	—
F7	—
F8	—
F9	Vacuum pump
F10	Front wiper
F11	—
F12	—
F13	Starter 2
F14	—
F15	Rear wiper
F16	—
F17	—
F18	—
F19	—
F20	—
F21	—
F22	Electronic brake control module
F23	Parking/Trailer lamps
F24	Right trailer stoplamp/Turn signal lamp
F25	Steering column lock
F26	—
F27	Left trailer stoplamp/Turn signal lamp
F28	—
F29	—
F30	Washer pump
F31	—
F32	Left low-beam headlamp
F33	Daylight running lamps
F34	Horn
F35	—
F36	—
F37	Right low-beam headlamp
F38	Automatic headlamp leveling motor
F39	Transmission control module
F40	Left rear bus electrical center/ Ignition
F41	Instrument cluster
F42	Heating, ventilation, and air conditioning
F43	Head-up display/ Reflective light auxiliary display
F44	Communication gateway module/ Run/Crank
F45	—
F46	—
F47	—
F48	—
F49	Interior rearview mirror
F50	Fuel Tank Zone Module / Shifter interface board / Run/Crank
F51	Heated steering wheel
F52	Folding seats switch
F53	Coolant pump
F54	—
F55	Air conditioning clutch
F56	—
F57	Engine control module/lgnition
F58	Transmission control module/ Ignition
F59	Engine control module battery
F60	Engine control module – Coil even
F61	O2 sensor 1/Air Flow
F62	—
F63	O2 sensor 2/ Canister/Engine oil/ Turbo
F64	Aeroshutter
F65	Engine control module powertrain 1
F66	Engine control module powertrain 2
F67	Engine control module-odd
F68	—
F69	—
F70	—
F71	—
F72	—
F73	—
F74	—
F75	—
F76	—
F77	—

Relays
K1	Starter 1
K2	Run/Crank
K3	Vacuum pump
K4	—
K5	Air conditioning
K6	—
K7	Engine control module
K8	Folding seats
K9	—
K10	Starter 2

Luggage compartment

Fuse Box Location

Fuse Box Diagram

Buick Enclave (II; 2022 - 2024) - fuse and relay box diagram - luggage compartment — Buick Enclave (II; 2022 – 2024) – fuse and relay box diagram – luggage compartment

Assignment of the fuses in the luggage compartment

№	Description
F1	—
F2	Trailer
F3	Folding seats
F4	Rear blower
F5	Rear drive control
F6	—
F7	Right window
F8	Rear defogger
F9	Left window
F10	—
F11	Trailer reverse
F12	USB port/Third row seats
F13	—
F14	—
F15	—
F16	—
F17	–/Air Quaslity Sensor
F18	—
F19	Ventilated seats / Massage
F20	—
F21	—
F22	—
F23	—
F24	Lumbar
F25	—
F26	Trailer brake lamps
F27	Massage
F28	Passive entry/ Passive start
F29	—
F30	Canister vent
F31	—
F32	Heated mirrors
F33	USB port/Second row seats
F34	Liftgate module
F35	Fuel system control module / Fuel tank zone module.
F36	—
F37	—
F38	Window module
F39	Rear closure
F40	Memory seat module
F41	Automatic occupancy sensor
F42	—
F43	—
F44	—
F45	Liftgate motor
F46	Rear heated seats
F47	—
F48	—
F49	—
F50	—
F51	—
F52	Semi-active dampening system module
F53	—
F54	External object calculating remote system/Side blind zone alert
F55	—
F56	Universal remote system/Overhead console/ Humidity Rain Sensor
F57	Hands free closure release
CB1	—
CB2	—
CB3	Rear auxiliary power outlet

Relays
K1	—
K2	—

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Audi Q8 (2023 – 2025) – fuse and relay box diagram

Posted on 5 August 20255 August 2025 by admin

Audi Q8 (2023 – 2025) – fuse and relay box diagram

This article covers to the Audi Q8 (B3), produced from 2018 to present. It includes fuse box diagrams for the 2023, 2024 and 2025 models, provides details on the location of the fuse panels inside the vehicle, and explains the function and layout of each fuse.

Year of production: 2023, 2024, 2025

Passenger compartment

Fuse box diagram (dashboard)

Assignment of the relays in the passenger compartment (dashboard)

№	Description
1	–
2	Audi phone box, external aerial
3	Air conditioner, perfume function
4	Head-up display
5	USB ports with charging function
7	Steering column lock
8	Upper/lower display
9	Instrument cluster
10	DVD drive
11	Light switches, switch panels
12	Steering column electronics
13	Volume control
14	MMI infotainment control unit
15	Steering column adjustment
16	Heating for steering wheel

Fuse box diagram (Footwell)

Version 1

Audi Q8 (2018 - 2022) - fuse and relay box diagram - passenger compartment (footwell) — Audi Q8 (2023 – 2025) – fuse and relay box diagram – passenger compartment (footwell)

Version 2 (RHD)

Audi Q8 (2018 - 2022) - fuse and relay box diagram - passenger compartment (footwell - RHD) — Audi Q8 (2023 – 2025) – fuse and relay box diagram – passenger compartment (footwell – RHD)

Assignment of the relays in the passenger compartment (footwell)

№	Description
	Fuse panel 1 (brown)
1	Catalytic converter heater, camshaft adjuster
2	Air mass meter, Lambda probes
3	Engine heating, injectors, exhaust flaps
4	Heating water pump, exhaust flaps, NOx sensor, particulate sensor, biodiesel sensor
5	Brake light sensor
6	Engine valves
7	Lambda probes, air mass meter
8	High-pressure pump, engine mountings
9	Engine components, engine relays
10	Oil pressure sensor, oil temperature sensor
11	48 V coolant pump, 48 V starter alternator, 12 V starter alternator
12	Engine valves
13	Engine cooling
14	Drive system control unit
15	Oxygen sensors
16	Fuel pump

	Fuse panel 2 (red)
1	Ignition coils
4	Electric compressor
5	Engine mountings
6	Windscreen washer system control unit
7	Dash panel
8	Air conditioner blowers
9	Control unit for driver assist systems
10	Emergency call and communication control unit
11	Power unit start, clutch for electric drive system

	Fuse panel 3 (black)
1	Seat heating (front)
2	Wipers
3	Headlight electronics (left)
4	Panorama sun roof
5	Door control unit (front left)
6	Sockets
7	Door control unit, rear right
9	Headlight electronics (right)
10	Control unit for windscreen/headlight washer system
11	Door control unit, rear left
12	Auxiliary heating, exterior sound generator

	Fuse panel 4 (brown)
1	Seat ventilation, seat electronics, interior mirror, A/C control console (rear), diagnostic connection, traffic information aerial (TMC)
2	Control unit for vehicle electrical system, diagnostic interface
3	Engine sound control unit
4	Gear oil cooling valve
5	Power unit start, electric drive system
7	Active accelerator
8	Night vision assist, active roll stabilisation
9	Adaptive cruise assist, front radar sensors
10	External sound generator
11	Intersection assist, driver assist systems
13	Left headlight
15	USB connection
	Fuse panel 5 (red)
1	Anti-theft alarm system
2	Drive system control unit
3	Seat electronics (front), lumbar support
4	Selector lever for automatic gearbox
5	Horn
6	Parking brake
7	Diagnostic interface
8	Roof electronics control unit
9	Electronic toll collection system (ETC)
10	Airbag control unit
11	Electronic stabilisation control (ESC), anti-lock brake system (ABS)
12	Diagnostic connection, light sensor/rain sensor
13	Air conditioner
14	Door control unit, front right
15	Air conditioner compressor
16	Brake system pressure accumulator

Luggage compartment

Fuse box diagram

Audi Q8 (2018 - 2022) - fuse and relay box diagram - footwell compartment — Audi Q8 (2023 – 2025) – fuse and relay box diagram – footwell compartment

Assignment of the relays in the luggage compartment

№	Description
	Fuse panel 1 (black)
1	High-voltage heater, thermal management
5	Air suspension/suspension control
6	Automatic gearbox control unit
7	Seat heating (rear), A/C control console (rear)
9	Central locking system, rear light (left-side)
10	Front belt tensioner (driver’s side)
11	Central locking for boot lid, fuel tank flap, luggage compartment cover
12	Boot lid control unit

	Fuse panel 2 (red)
1	Air conditioner blowers (rear)
2	Sound system
3	Emission control, engine sound control unit
4	A/C control console (rear)
5	Towing bracket (right lights)
6	Towing bracket swivel motor
7	Towing bracket release
8	Towing bracket (left lights)
9	Electrical socket for towing bracket
10	Four-wheel sport differential
11	Emission control
12	Rear belt tensioner (driver’s side)

	Fuse panel 3 (brown)
1	Control unit for driver assist systems
3	Lumbar support (right-side)
4	Side assist
6	Tyre pressure loss indicator
7	External aerial
8	Remote control receiver (auxiliary heater), fuel tank module
10	TV tuner, control unit for data exchange and telematics
11	Control unit for convenience access and start authorisation
12	Garage door opener
13	Reversing camera, surround view cameras
14	Convenience system control unit, rear light (right-side)
15	Rear belt tensioner (passenger’s side)
16	Front belt tensioner (passenger’s side)

	Fuse panel 4 (red)
1	Active roll stabilisation
2	Emergency cut-out connection for high-voltage battery
3	Coolant pump for high-voltage battery
4	Power electronics control unit
5	Brake servo
6	Voltage transformer
7	Engine start
8	Air conditioner compressor
9	Control unit for additional battery
10	High-voltage battery
11	Charging system
12	Remote control receiver for auxiliary heater/air conditioning
14	Thermal management, coolant pumps
15	Thermal management control unit

	Fuse panel 5 (brown)
7	Seat heating (front)
9	Emission control
10	Seat heating (rear), A/C control console (rear)
12	Emission control

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Audi Q8 (2018 – 2022) – fuse and relay box diagram

Posted on 5 August 20255 August 2025 by admin

Audi Q8 (2018 – 2022) – fuse and relay box diagram

This article covers to the Audi Q8 (B3), produced from 2018 to present. It includes fuse box diagrams for the 2018, 2019, 2020, 2021 and 2022 models, provides details on the location of the fuse panels inside the vehicle, and explains the function and layout of each fuse.

Year of production: 2018, 2019, 2020, 2021, 2022

Passenger compartment

Fuse box diagram (dashboard)

Assignment of the relays in the passenger compartment (dashboard)

№	Description
A2	Audi phone box, roof antenna
A3	2019: Climate control system, fragrance system, ionizer; 2020: Climate control system, fragrance system, particulate matter sensor 2021-2022: Climate control system, fragrance system
A4	Head-up display
A5	Audi music interface, USB sockets
A7	Steering column lock
A8	Upper/lower display
A9	Instrument cluster
A10	CD/DVD player
A11	Light switch, switch panels
A12	Steering column electronics
A13	Volume control
A14	MMI Infotainment system control module
A15	Steering column adjustment
A16	Steering wheel heating

Fuse box diagram (Footwell)

Version 1

Version 2 (RHD)

Assignment of the relays in the passenger compartment (footwell)

№	Description
	Fuse panel A (brown)
A1	2019: Not Used; 2020-2021: Catalytic converter heating 2022: Catalytic converter heating, camshaft adjustment
A2	2019-2021: Engine components 2022: Mass airflow sensor, heated oxygen sensors
A3	2019-2021: Engine components 2022: Motor heating, fuel injectors, exhaust doors
A4	2019-2021: Engine components 2022: Hot water pump, exhaust doors, NOX sensor, particulate sensor, biodiesel sensor
A5	Brake light sensor
A6	2019-2021: Engine components 2022: Engine valves
A7	2019-2021: Engine components 2022: Heated oxygen sensor, mass airflow sensor
A8	2019-2021: Engine components 2022: High pressure pump, motor mount
A9	2019-2021: Engine components 2022: Motor components, motor relay
A10	Oil pressure sensor, oil temperature sensor
A11	2019: Engine Start; 2020-2021: Engine components 2022: 48 volt coolant pump, 48 volt starter generator, 12 volt starter generator
A12	2019-2021: Engine components 2022: Engine valves
A13	Engine cooling
A14	Engine control module
A15	2019-2021: Engine sensors 2022: Heated oxygen sensors
A16	Fuel pump

	Fuse panel B (red)
B1	Ignition coils
B3	2019: Not Used; 2020-2022: High-voltage heating
B4	2019: Not Used; 2020-2022: Electric compressor
B5	Engine mount
B6	Windshield washer system control module
B7	Instrument panel
B8	Climate control system fresh air blower
B9	Driver assist systems control module
B10	Emergency call system
B11	2019-2021: Engine start 2022: Engine start, electric drive clutch

	Fuse panel C (black)
C1	Front seat heating
C2	Windshield wipers
C3	Left headlight electronics
C4	Panoramic glass roof
C5	Left front door control module
C6	Sockets
C7	Right rear door control module
C9	Right headlight electronics
C10	Windshield washer system/headlight washer system
C11	Left rear door control module
C12	Parking heater

	Fuse panel D (brown)
D1	2019-2020: Seat ventilation, seat electronics, rearview mirror, rear climate control panel, diagnostic connector 2021-2022: Seat ventilation, seat electronics, rearview mirror, rear climate control system control panel, diagnostic connection, traffic information antenna (TMC)
D2	2019: Climate control module, gateway control module; 2020-2022: Vehicle electrical system control module, gateway control module
D3	Sound actuator/exhaust sound tuning
D4	2019: Transmission heating valve, Transmission fluid cooling valve; 2020-2022: Transmission fluid cooling valve
D5	2019-2021: Engine start 2022: Engine start, electric drive
D8	2019: Night vision assist; 2020-2022: Night vision assist, active roll stabilization
D9	2019-2020: Adaptive cruise assist, front radar 2021-2022: Adaptive cruise assist, front wheel sensors
D10	2019: Not Used; 2020-2022: Exterior sound
D11	Intersection assistant, driver assist systems
D13	Left headlight
D15	2021-2022: USB input

	Fuse panel E (red)
E1	Anti-theft alarm system
E2	Engine control module
E3	Front seat electronics, lumbar support
E4	Automatic transmission selector lever
E5	Horn
E6	Parking brake
E7	Gateway control module (diagnosis)
E8	2019: Interior headliner lights; 2020-2022: Roof electronics control module
E9	2019: Not Used; 2020-2022: Drivetrain generator
E10	Airbag control module
E11	2019: Electronic Stabilization Control (ESC); 2020-2022: Electronic Stabilization Control (ESC), Anti-Lock Braking System (ABS)
E12	Diagnostic connector, light/rain sensor
E13	Climate control system
E14	Right front door control module
E15	2019: Climate control system, body electronics; 2020-2022: Climate control system compressor
E16	2022: Brake system pressure reservoir

Luggage compartment

Fuse box diagram

Assignment of the relays in the luggage compartment

№	Description
	Fuse panel A (black)
A1	2019: Not Used; 2020-2021: High-voltage heating, thermomanagement
A5	Air suspension/damping
A6	Automatic transmission
A7	2019: Rear seat heating; 2020-2021: Rear seat heating, control panel for rear climate control
A9	Central locking, left tail light
A10	Front belt tensioner on driver’s side
A11	2019: Central locking, rear blind; 2020-2021: Luggage compartment lid central locking, fuel filler door, luggage compartment cover
A12	Luggage compartment lid control module

	Fuse panel B (red)
B1	Rear climate control system blower
B2	Sound-amplifier
B3	Exhaust treatment, sound actuator
B4	Rear climate control system control panel
B5	Right trailer hitch light
B6	Trailer hitch positioning motor
B7	Trailer hitch release
B8	Left trailer hitch light
B9	Trailer hitch socket
B10	All wheel drive sport differential
B11	Exhaust treatment
B12	Driver’s side rear safety belt tensioner

	Fuse panel C (brown)
C1	Driver assist systems control module
C2	Audi phone box
C3	2019: Right front lumbar support; 2020-2021: Front seat electronics, right lumbar support 2022: Right lumbar support
C4	Side assist
C6	Tire pressure monitoring system
C7	2021-2022: Exterior antenna
C8	2019: Fuel tank monitoring; 2020-2022: Parking heater radio receiver, fuel tank monitoring
C10	2019: TV tuner; 2020-2022: TV tuner, data exchange and telematics control module
C11	Convenience access and start authorization control module
C12	Garage door opener
C13	Rearview camera, peripheral cameras
C14	2019: Central locking, tail lights; 2020: Right tail light, comfort system 2021-2022: Convenience system control module, right tail light
C15	Passenger’s side rear safety belt tensioner
C16	Front belt tensioner on front passenger’s side

	Fuse panel D (red)
D1	2020-2022: Active roll stabilization
D2	2022: High-voltage battery
D3	2022: High-voltage battery coolant pump
D4	2022: Power electronics control module
D5	2019: Brake system 2022: Brake booster
D6	Voltage converter
D7	2022: Engine start
D8	2022: Climate control system compressor
D9	Auxiliary battery control module
D10	2022: High-voltage battery
D11	2022: Charging system
D12	2022: Auxiliary heating and air conditioning radio receiver
D14	2022: Thermal management, coolant pumps
D15	2020-2022: Thermomanagement control module

	Fuse panel E (brown)
E7	2019: Front seat heating; 2022: Front seat heating
E9	2019: Exhaust treatment; 2022: Exhaust treatment
E10	2022: Rear seat heating, rear climate control system controls
E12	2019: Exhaust treatment; 2022: Exhaust treatment

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Cadillac ATS (2018 – 2019) – fuse and relay box diagram

Posted on 16 July 202516 July 2025 by admin

Cadillac ATS (2018 – 2019) – fuse and relay box diagram

Year of production: 2018, 2019

The Cadillac ATS, a compact executive 4-door sedan, was manufactured from 2013 to 2019. This article provides fuse box diagrams for the 2018 and 2019 models, along with information on the location of the fuse panels within the vehicle and details on the function and layout of each fuse and relay.

Engine compartment

Fuse box location

The underhood fuse block is on the passenger side of the engine compartment.

Fuse box diagram

Cadillac ATS (2018 - 2019) - fuse and relay box diagram - engine compartment — Cadillac ATS (2018 – 2019) – fuse and relay box diagram – engine compartment

Assignment of the fuses and relays in the engine compartment (2018 – 2019)

№	Usage
1	Not Used
2	Not Used
3	Passenger motorized seat belt
4	Not Used
5	Not Used
6	Driver power seat
7	Not Used
9	Not Used
10	Not Used
11	Not Used
12	Not Used
13	Passenger power seat
14	Not Used
15	Passive entry/Passive start
16	Not Used
17	Headlamp washer
18	Not Used
19	Antilock brake system pump
20	Antilock brake system valve
21	Not Used
22	Driver motorized seat belt
26	Not Used
27	–/Heated seat 2
28	–/Reverse lock out
29	Adaptive forward lighting, Automatic headlamp leveling/ Pedestrian protection
30	Not Used
31	Passenger window switch
32	Not Used
33	Sunroof
34	Front wiper
35	Steering column lock
36	Rear bussed electrical center/Ignition
37	–/Malfunction Indicator Lamp/ Ignition
38	Aeroshutter
39	O2 sensor/Emissions
40	Ignition coil even/O2 sensor
41	Ignition coil odd
42	Engine control module
43	Not Used
44	Not Used
45	Washer
48	Instrument panel/ Body/Ignition
49	Fuel system control module/Ignition
50	Heated steering wheel
51	Engine control module/Ignition
52	Transmission control module/Ignition
53	Coolant pump
55	Not Used
56	Transmission control module
64	Adaptive headlamp leveling
65	Left HID headlamp
66	Right HID headlamp
67	Left/Right high-beam headlamp
68	Headlamp leveling motor
69	Horn
71	Cooling fan
72	Starter 2
73	Brake vacuum pump
74	Starter 1
75	Air conditioning clutch
76	Not Used

Relays
8	Headlamp washer
23	Wiper control
24	Wiper speed
25	Engine control module
46	Rear washer
47	Front washer
54	Coolant pump
57	Low-beam headlamp relay
58	High-beam headlamp
59	Run/Crank
60	Starter 2
61	Vacuum pump
62	Starter 1
63	Air conditioning control
70	Horn

Passenger compartment

Fuse box location

The instrument panel fuse block is in the end of the driver side of the instrument panel.

Fuse box diagram

Cadillac ATS (2018 - 2019) - fuse and relay box diagram - passenger compartment — Cadillac ATS (2018 – 2019) – fuse and relay box diagram – passenger compartment

Assignment of the fuses and relays in the engine compartment (2018 – 2019)

№	Usage
2	Cupholder motor
3	Electric steering column lock
4	Not Used
5	Not Used
6	Tilt and telescopic steering column
8	Data link connector
9	Glovebox release
10	Shunt
11	Body control module 1
12	Body control module 5
13	Body control module 6
14	Not Used
15	Body control module 7
16	Transmission control module
17	Not Used
18	Not Used
19	Auxiliary power outlet
20	Lighter
21	Wireless charger
22	Sensing diagnostic module/Automatic occupant sensing
23	Radio/DVD/Heating, ventilation/Air conditioning control
24	Display
25	Heated steering wheel
26	Wireless charger
27	Steering wheel controls
28	Not Used
29	Visor vanity lamp
30	Not Used
31	Retained accessory power/Accessory
32	Not Used
33	Front heating, ventilation/Air conditioning control blower

Circuit Breakers
CB1	Auxiliary power outlet
CB7	Not Used

Relays
K10	Retained accessory power/Accessory
K605	Logistics
K644	Retained accessory power/Accessory / Glovebox release

Rear compartment

Fuse box location

The rear compartment fuse block is behind a cover on the driver side of the rear compartment.

Fuse box diagram

Cadillac ATS (2018 - 2019) - fuse and relay box diagram - rear compartment — Cadillac ATS (2018 – 2019) – fuse and relay box diagram – rear compartment

Assignment of the fuses and relays in the rear compartment (2018 – 2019)

№	Usage
1	Rear driver control module/DC DC transformer
2	Left window
3	Body control module 8
4	Alternate current inverter
5	Passive entry/Passive start/Battery 1
6	Body control module 4
7	Heated mirrors
8	Amplifier
9	Rear window defogger
10	Glass break
11	Trailer connector
12	OnStar (if equipped)
13	Right window
14	Electric parking brake
15	Not Used
16	Trunk release
19	Logistics
21	Mirror window module
22	Not Used
23	Canister vent
24	Body control module 2
25	Rear vision camera
26	Front ventilated seats
27	Side blind zone alert/ Lane departure warning/External object calculating module
28	Trailer/Sunshade
29	Rear heated seats
30	Semi-active damping system
31	Transfer case control module/Rear control drive module
32	Theft module/ Universal garage door opener/Rain sensor
33	Ultrasonic parking assist
34	Radio/DVD
35	– /Exhaust valve (V-series)
36	Trailer
37	Fuel system control module
38	Fuel pump prime/ Exhaust valve (V-series)
39	Not Used
42	Memory seat module
43	Body control module 3
44	Not Used
45	Battery regulated voltage control
46	Engine control module/Battery
47	Not Used
48	Not Used
49	Trailer module
53	Not Used
55	Not Used

Relays
17	Trailer
18	Logistics
20	Rear window defogger
40	Run crank 2 (V-series)
41	Fuel pump prime/ Run crank 2
50	Child door lock security
51	Rear closure
52	Rear closure 2
54	Door lock security
56	Fuel door

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Volkswagen Passat (B8; 2015 – 2019) – fuse and relay box diagram

Posted on 9 July 202510 July 2025 by admin

Volkswagen Passat (B8; 2015 – 2019) – fuse and relay box diagram

Year of production: 2014, 2015, 2016, 2017, 2018, 2019

This article covers the eighth-generation Volkswagen Passat (B8), manufactured from 2014 to 2022. It includes fuse box diagrams for the 2014 through 2019 models, provides information on the locations of the fuse panels inside the vehicle, and details the purpose and layout of each fuse and relay.

Passenger Compartment Fuse Box (Fuse Panel C -SC-)

Fuse Box Diagram

Volkswagen Passat (B8; 2015 - 2019) - fuse and relay box diagram -passenger compartment (fuse panel C) — Volkswagen Passat (B8; 2015 – 2019) – fuse and relay box diagram -passenger compartment (fuse panel C)

Assignment of the fuses in the instrument panel fuse box

№	Amps	Function / component
SC1	30 A	Control unit for reducing agent heater
SC2	10 A	Steering column electronics control unit
SC3	–	–
SC4	7.5 A	Alarm horn
SC5	5 A / 7.5 A	Data bus diagnostic interface
SC6	5 A / 7.5 A	Anti-theft alarm sensor Selector lever
SC7	10 A	Heater and air conditioning controls Selector lever Remote control receiver for auxiliary coolant heater Heated rear window relay Analogue clock Operating and display unit for rear air conditioning system Tyre Pressure Monitoring System control unit Magnetic clutch relay
SC8	10 A / 7.5 A	Rotary light switch Electromechanical parking brake button Rain and light sensor Diagnostic connection Anti-theft alarm sensor Front interior light Light for left dashboard background lighting Light for right dashboard background lighting Light for front left door contour lighting Light for front right door contour lighting Light for rear left door contour lighting Light for rear right door contour lighting Control unit for cornering light and headlight range control
SC9	1 A / 5 A / 7.5 A	Steering column electronics control unit
SC10	7.5 A / 10 A	Display unit for front information display and operating unit control unit TV tuner Control unit for Head-up Display CD player
SC11	25 A / 40 A	Control unit for front left belt tensioner Onboard supply control unit Front left headlight
SC12	5 A / 7.5 A / 20 A	Control unit 1 for information electronics
SC13	15 A / 25 A	Electronically controlled damping control unit Control unit for front left belt tensioner
SC14	30 A / 40 A	Fresh air blower control unit
SC15	10 A	Control unit for electronic steering column lock
SC16	7.5 A	Two-way signal amplifier for mobile telephone/data services Storage compartment with interface for mobile telephone USB hub Chip card reader TV tuner
SC17	5 A / 7.5 A	Dash panel insert Emergency call module control unit and communication unit Telematics control unit for real-time monitoring
SC18	7.5 A	Reversing camera Rear lid handle release button Control unit for overhead view camera Rear overhead view camera
SC19	7.5 A	Interface for entry and start system
SC20	7.5 A / 10 A	Relay for reducing agent metering system
SC21	15 A	All-wheel drive control unit
SC22	15 A	Trailer detector control unit
SC23	40 A / 20 A	Onboard supply control unit Front right headlight Sliding sunroof adjustment control unit
SC24	30 A / 40 A	Sliding sunroof adjustment control unit Onboard supply control unit Front right headlight
SC25	30 A	Driver door control unit (Only left-hand drive models) Front passenger door control unit (Only right-hand drive models) Rear left door control unit Rear left window regulator motor
SC26	30 A	Onboard supply control unit Seat heating
SC27	30 A / 40 A	Digital sound package control unit Onboard supply control unit
SC28	20 A / 25 A	Trailer detector control unit
SC29	–	–
SC30	10 A	High-voltage battery 1 Maintenance connector for high-voltage system
SC31	30A / 40 A	Onboard supply control unit Front left headlight Rear lid control unit
SC32	7.5 A / 10 A	Front camera for driver assist systems Adaptive cruise control unit Parking aid control unit Park assist steering control unit Blind Spot Monitor control unit Blind Spot Monitor control unit 2
SC33	5 A / 7.5 A	Airbag control unit Warning lamp for airbag deactivated on front passenger side
SC34	7.5 A	Electromechanical parking brake button Interior mirror Relay for power sockets Pedestrian protection warning lamp Switch module 2 in centre console Pressure sender for refrigerant circuit External air quality and air humidity sensor
SC35	7.5 A / 10 A	Diagnostic connection Headlight range control and instrument illumination regulator Control unit for cornering light and headlight range control Front left headlight Left headlight range control motor Front right headlight Right headlight range control motor
SC36	5 A / 7.5 A	Front right headlight Output module 1 for right LED headlight
SC37	5 A / 7.5 A	Front left headlight Output module 1 for left LED headlight
SC38	25 A	Trailer detector control unit
SC39	30 A	Front passenger door control unit (Only left-hand drive models) Driver door control unit (Only right-hand drive models) Rear right door control unit Rear right window regulator motor
SC40	20 A	Cigarette lighter 12V socket 12V socket 2 12V socket 3
SC41	25 A	Control unit for front right belt tensioner
SC42	40 A	Onboard supply control unit Central locking
SC43	30 A / 40 A	Onboard supply control unit Digital sound package control unit
SC44	15 A	Trailer detector control unit
SC45	15 A	Driver seat lumbar support adjustment switch Driver seat adjustment operating unit Driver seat adjustment control unit Operating unit for front left seat adjustment Massage control unit Front left seat cushion fan 1 Front left seat backrest fan 1
SC46	30 A	DC/AC converter with socket, 12V – 230V
SC47	15 A / 7.5 A	Rear window wiper motor Rear roller blind control unit
SC48	7.5 A	Engine sound generator control unit
SC49	5 A / 7.5 A	Clutch position sender Starter relay 1 Starter relay 2 High-voltage battery 1
SC50	40 A	Rear lid control unit
SC51	25 A	Operating and display unit for rear air conditioning system
SC52	15 A	Electronically controlled damping control unit
SC53	30 A	Heated rear window relay
R1		Relay for reducing agent metering system
R2		Magnetic clutch relay
R3		–
R4		Terminal 15 voltage supply relay
R5		Heated rear window relay
R6		Relay for power sockets

Fitting location of front passenger seat adjustment thermal fuse

Assignment of the fuses in the front passenger seat adjustment thermal fuse

№	Amps	Function/component
A	15 A	Operating unit for front right seat adjustment Front right lumbar support adjustment switch Front right seat cushion fan 1 Front right seat backrest fan 1
B	–

Engine Compartment Fuse Box (Fuse panels B -SB- & A -SA-)

Fuse Box Diagram

Volkswagen Passat (B8; 2015 - 2019) - fuse and relay box diagram -engine compartment (fuse panel B and A) — Volkswagen Passat (B8; 2015 – 2019) – fuse and relay box diagram -engine compartment (fuse panel B and A)

Assignment of the fuses in the engine compartment fuse box

№	Amps	Function / component
SB1	25 A / 40 A	ABS control unit
SB2	40 A	ABS control unit ABS hydraulic pump
SB3	15 A / 30 A	Engine/motor control unit
SB4	10 A / 5 A / 7.5 A	Radiator fan Oil level and oil temperature sender Relay for reducing agent metering system High heat output relay Low heat output relay Charge pressure positioner Activated charcoal filter solenoid valve 1 Exhaust camshaft control valve 1 Camshaft control valve 1 Valve for oil pressure control Inlet cam actuator for cylinder 2 Exhaust cam actuator for cylinder 2 Inlet cam actuator for cylinder 3 Exhaust cam actuator for cylinder 3 Fuel cooling valve Exhaust gas recirculation cooler changeover valve Charge pressure control solenoid valve Turbocharger air recirculation valve Power steering control unit
SB5	10 A	Fuel pressure regulating valve Fuel metering valve Camshaft control valve 1 Exhaust cam actuator A for cylinders 1-4 Exhaust cam actuator B for cylinders 1-4 Injector, cylinders 1-4 Engine component current supply relay Coolant valve for gearbox Coolant pump for high-voltage battery Coolant pump for high-temperature circuit
SB6	5 A / 7.5 A	Brake light switch
SB7	10 A / 15 A / 7.5 A	Fuel metering valve Circulation pump Radiator blind control motor Coolant valve for cylinder head Valve for oil pressure control Exhaust gas recirculation cooler changeover valve Charge pressure positioner Coolant pump for high-temperature circuit Charge air cooling pump Auxiliary pump for heating Coolant valve for gearbox Coolant shut-off valve Gearbox oil cooling pump Fuel pressure regulating valve Coolant changeover valve 2 Coolant changeover valve 1 Coolant pump for low-temperature circuit
SB8	10 A / 15 A	Lambda probe 1 before catalytic converter Lambda probe heater Lambda probe 1 after catalytic converter Lambda probe 1 heater after catalytic converter NOx sender
SB9	20 A / 5 A / 10 A / 7.5 A	Ignition coils 1-4 with output stage Heater element for crankcase breather Automatic glow period control unit Air mass meter Charge air cooling pump Activated charcoal filter solenoid valve 1 Exhaust camshaft control valve 1 Camshaft control valve 1
SB10	20 A / 10 A / 15 A	Fuel pump control unit
SB11	40 A	Auxiliary air heater element
SB12	40 A	Auxiliary air heater element
SB13	30 A / 15 A / 7.5 A	Mechatronic unit for dual clutch gearbox Dual clutch gearbox Auxiliary hydraulic pump 1 for gearbox oil Brake servo
SB14	40 A / 30 A	Heated windscreen relay
SB15	15 A	Horn relay
SB16	10 A / 20 A	Engine component current supply relay Power and control electronics for electric drive Charging unit 1 for high-voltage battery
SB17	7.5 A	Main relay Terminal 30 voltage supply relay Engine/motor control unit ABS control unit Heated windscreen relay
SB18	5 A / 7.5 A	Battery monitor control unit Data bus diagnostic interface
SB19	30 A	Wiper motor control unit
SB20	10 A	Alarm horn
SB21	30 A / 15 A	Heated windscreen relay 2 Mechatronic unit for dual clutch gearbox Dual clutch gearbox Auxiliary hydraulic pump 1 for gearbox oil
SB22	5 A / 7.5 A	Engine/motor control unit
SB23	30 A	Starter
SB24	40 A	Auxiliary air heater element Brake servo
SB25	–	–
SB26	–	–
SB27	–	–
SB28	–	–
SB29	–	–
SB30	–	–
SB31	–	–
SB32	30 A	Heated windscreen (Only models with battery at rear)
SB33	15 A / 30 A	Mechatronic unit for dual clutch gearbox Dual clutch gearbox Brake system pressure accumulator
SB34	5 A / 30 A	Brake servo Heated windscreen (Only models with battery at front)
SB35	30 A / 7.5 A	Wiper motor control unit Air conditioning system relay
SB36	–	–
SB37	20 A	Auxiliary heater control unit
SB38	–	–
SA1	125 A / 80 A	Supply for fuse holder C -SC- Fuses on fuse holder C: 2, 14, 22, 31, 38, 41, 46, 51, 53 Relay for power sockets Terminal 15 voltage supply relay Radiator fan (Only models with battery at rear)
SA2	400 A	Alternator
SA3	80 A	Power steering control unit (Only models with battery at front)
SA4	80 A	Supply for fuse holder C Terminal 30 Fuses on fuse holder C: 1, 3, 15, 21, 23, 28, 43, 45, 50 Power steering control unit (Only models with battery at rear)
SA5	50 A	Radiator fan Supply for fuse 4 on fuse holder A Power steering control unit (Only models with battery at rear)
R1		Starter relay 1
R2		Starter relay 2
R3		Horn relay
R4		High heat output relay (Only models with auxiliary air heater)
R5		Main relay (Only models with petrol engine) Terminal 30 voltage supply relay (Only models with diesel engine)
R6		Automatic glow period control unit (Only models with diesel engine) Coolant shortage indicator control unit (Only models with hybrid drive system)
R7		Low heat output relay (Only models with auxiliary air heater)
R8		Air conditioning system relay (Only models with hybrid drive system) Engine component current supply relay (Only models with a 1.8–2.0l petrol engine)
R9		Heated windscreen relay 1
R10		Heated windscreen relay 2

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Volkswagen Passat (B9; 2024 – 2025) – fuse and relay box diagram

Posted on 9 July 20259 July 2025 by admin

Volkswagen Passat (B9; 2024 – 2025) – fuse and relay box diagram

Year of production: 2024, 2025

This article focuses on the ninth-generation Volkswagen Passat (B9), produced in 2024 and 2025. It includes fuse box diagrams for the 2024 and 2025 models, provides details on the locations of the fuse panels within the vehicle, and explains the function and layout of each fuse and relay.