Cadillac CTS (2016) – fuse box diagram

Cadillac CTS (2016) – fuse box diagram

Year of production: 2016

Engine compartment fuse block

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

Cadillac CTS mk3 - fuse box - engine comparment
Cadillac CTS mk3 – fuse box – engine comparment
Fuse Usage
1 Not Used
2 Not Used
3* Passenger motorized seat belt
4 Body Control Module 6
5 Not Used
6 Driver Power Seat
7 Not Used
8* Headlamp Washer Relay
9 Not Used
10 Not Used
11 Not Used
12 Not Used
13 Passenger Power Seat
14 Body Control Module 5
15 Front Wiper
16 Not Used
17* Headlamp Washer
18 Not Used
19 Antilock Brake System Pump
20 Antilock Brake System Valve
21* AIR Pump
22 Driver motorized seat belt
23 Wiper Control Relay
24 Wiper Speed Relay
25 Engine Control Module Relay
26* AIR Pump Relay
27 Spare/Heated Seat 2
28 Body Control Module 1/Spare
29* AFS AHL/Pedestrian Protection
30 Passenger Window Switch
31 Body Control Module 7
32 Sunroof
33 Not Used
34 AOS Display/MIL Ignition
35 Rear Electrical Center Ignition
36 Spare PT Fuse
37 Oxygen Sensor
38 Ignition Coils/Injectors
39 Ignition Coils/Injectors/Spare
40 Engine Control Module
41 Fuel Heater
42* AIR Solenoid Relay
43 Washer
44 Not Used
45 Front Washer Relay
46 Not Used
47 Instrument Panel Body Ignition
48 Fuel System Control Module Ignition
49 Heated Steering Wheel
50* Steering Column Lock
51* Coolant Pump
52* Coolant Pump Relay
53 Air Conditioning Compressor Clutch
54* AIR Solenoid
55 Transmission Control Module/Spare
56* Headlamp Low Relay
57 Headlamp High Relay
58 Starter
59 Starter Relay
60 Run/Crank Relay
61* Vacuum Pump Relay
62 Air Conditioning Control Relay
63* Adaptive Headlamp Leveling
64* Left High Intensity Discharge Headlamp
65* Right High Intensity Discharge Headlamp
66 Headlamp High Left/Right
67 Horn
68 Horn Relay
69 Cooling Fan
70 Aero Shutter
71 Transmission Control Module Ignition
72 Engine Control Module Ignition
73* Brake Vacuum Pump
74 Not Used
* Optional

Instrument Panel Fuse Block

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

Cadillac CTS mk3 - fuse box - instrument panel
Cadillac CTS mk3 – fuse box – instrument panel
Mini Fuses Usage
2 Motorized Cupholder
3 Electric Steering Column Lock
4 Data Link Connector
5 Heater, Ventilation, and Air Conditioning Control
6 Tilt and Telescoping Steering Column
8 Spare
9 Glove Box Release
10 Shunt
11 Body Control Module 1
12 Body Control Module 5
13 Spare
14 Spare
15 Spare
16 Spare
17 Spare
18 Spare
19 Spare
20 Spare
21 Spare
22 Sensing Diagnostic Module/Automatic Occupant Sensing
23 Radio/DVD/Heater, Ventilation, and Air Conditioning
24 Display
25 Heated Steering Wheel
26 Wireless Charger
27 Steering Wheel Switches
28 Spare
29 Visior
30 Spare

 

J Case Fuses Usage
31 Spare
32 Spare
33 Front Heater, Ventilation, and Air Conditioning Blower

 

Circuit Breakers Usage
CB1 Retained Accessory Power/Accessory Power Outlet Power
CB7 Spare

 

Relays Usage
K10 Retained Accessory Power/Accessory
K605 Logistics
K644 Glove Box Release

Rear Compartment Fuse Block

The rear compartment fuse block is behind a cover on the driver side of the rear compartment.
The vehicle may not be equipped with all of the fuses, relays, and features shown.

Cadillac CTS mk3 - fuse box - rear comparment
Cadillac CTS mk3 – fuse box – rear comparment
Number Usage
1* Electronic Limited Slip Differential/DC DC Transformer
2 Left Window
3 Body Control Module 8
4* A/C 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
17* Run Relay
18* Logistics Relay
19* Logistics Fuse
20 Rear Window Defogger Relay
21 Mirror Window Module
22 Pedestrian Protection
23 Canister Vent
24 Body control module 2
25* Rear Vision Camera
26* Front Ventilated Seats
27* SBZA/LDW/EOCM
28* Trailer/Sunshade
29* Rear Heated Seats
30* Semi-Active Damping System
31* Transfer Case Control Module/Electronic Limited Slip Differential
32 Theft Module/Universal Garage Door Opener/Rain Sensor
33* UPA
34* Radio/DVD
35 Spare
36* Trailer
37 Fuel Pump/Fuel System Control Module
38 Not Used
39 Not Used
40 Not Used
41 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
50 Door Lock Security
51 Rear Closure Release
52 Not Used
53 Not Used
54 Door Lock Security
55 Not Used
56* Fuel Door
* Optional

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

Cadillac CTS (2014 – 2015) – fuse box diagram

Cadillac CTS (2014 – 2015) – fuse box diagram

Year of production: 2014, 2015

Engine compartment fuse block

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

Cadillac CTS mk3 - fuse box - engine comparment
Cadillac CTS mk3 – fuse box – engine comparment
Fuse Usage
1 Not Used
2 Not Used
3* Not Used
4 Body Control Module 6
5 Not Used
6 Driver Power Seat
7 Not Used
8* Headlamp Washer Relay
9 Not Used
10 Not Used
11 Not Used
12 Not Used
13 Passenger Power Seat
14 Body Control Module 5
15 Front Wiper
16 Not Used
17* Headlamp Washer
18 Not Used
19 Antilock Brake System Pump
20 Antilock Brake System Valve
21* AIR Pump
22 MSB Driver
23 Wiper Control Relay
24 Wiper Speed Relay
25 Engine Control Module Relay
26* AIR Pump Relay
27 Spare/Heated Seat 2
28 Body Control Module 1/Spare
29* AFS AHL/Pedestrian Protection
30 Passenger Window Switch
31 Body Control Module 7
32 Sunroof
33 Not Used
34 AOS Display/MIL Ignition
35 Rear Electrical Center Ignition
36 Spare PT Fuse
37 Oxygen Sensor
38 Ignition Coils/Injectors
39 Ignition Coils/Injectors/Spare
40 Engine Control Module
41 Fuel Heater
42* AIR Solenoid Relay
43 Washer
44 Not Used
45 Front Washer Relay
46 Not Used
47 Instrument Panel Body Ignition
48 Fuel System Control Module Ignition
49 Heated Steering Wheel
50* Steering Column Lock
51* Coolant Pump
52* Coolant Pump Relay
53 Air Conditioning Compressor Clutch
54* AIR Solenoid
55 Transmission Control Module/Spare
56* Headlamp Low Relay
57 Headlamp High Relay
58 Starter
59 Starter Relay
60 Run/Crank Relay
61* Vacuum Pump Relay
62 Air Conditioning Control Relay
63* Adaptive Headlamp Leveling
64* Left High Intensity Discharge Headlamp
65* Right High Intensity Discharge Headlamp
66 Headlamp High Left/Right
67 Horn
68 Horn Relay
69 Cooling Fan
70 Aero Shutter
71 Transmission Control Module Ignition
72 Engine Control Module Ignition
73* Brake Vacuum Pump
74 Not Used
* Optional

 

Instrument Panel Fuse Block

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

Cadillac CTS mk3 - fuse box - instrument panel
Cadillac CTS mk3 – fuse box – instrument panel
Mini Fuses Usage
2 Motorized Cupholder
3 Electric Steering Column Lock
4 Data Link Connector
5 Heater, Ventilation, and Air Conditioning Control
6 Tilt and Telescoping Steering Column
8 Spare
9 Glove Box Release
10 Shunt
11 Body Control Module 1
12 Body Control Module 5
13 Spare
14 Spare
15 Spare
16 Spare
17 Spare
18 Spare
19 Spare
20 Spare
21 Spare
22 Sensing Diagnostic Module/Automatic Occupant Sensing
23 Radio/DVD/Heater, Ventilation, and Air Conditioning
24 Display
25 Heated Steering Wheel
26 Wireless Charger
27 Steering Wheel Switches
28 Spare
29 Spare
30 Spare

 

J Case Fuses Usage
31 Spare
32 Spare
33 Front Heater, Ventilation, and Air Conditioning Blower

 

Circuit Breakers Usage
CB1 Retained Accessory Power/Accessory Power Outlet Power
CB7 Spare

 

Relays Usage
K10 Retained Accessory Power/Accessory
K605 Logistics
K644 Glove Box Release

Rear Compartment Fuse Block

The rear compartment fuse block is behind a cover on the driver side of the rear compartment.
The vehicle may not be equipped with all of the fuses, relays, and features shown.

Cadillac CTS mk3 - fuse box - rear comparment
Cadillac CTS mk3 – fuse box – rear comparment
Number Usage
1* Electronic Limited Slip Differential/DC DC Transformer
2 Left Window
3 Body Control Module 8
4* A/C 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
17* Run Relay
18* Logistics Relay
19* Logistics Fuse
20 Rear Window Defogger Relay
21 Mirror Window Module
22 Pedestrian Protection
23 Canister Vent
24 Pedestrian Protection
25* Rear Vision Camera
26* Front Ventilated Seats
27* SBZA/LDW/EOCM
28* Trailer/Sunshade
29* Rear Heated Seats
30* Semi-Active Damping System
31* Transfer Case Control Module/Electronic Limited Slip Differential
32 Theft Module/Universal Garage Door Opener/Rain Sensor
33* UPA
34* Radio/DVD
35 Not Used
36* Trailer
37 Fuel Pump/Fuel System Control Module
38 Not Used
39 Not Used
40 Not Used
41 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
50 Door Lock Security
51 Rear Closure Release
52 Not Used
53 Not Used
54 Door Lock Security
55 Not Used
56* Fuel Door
* Optional

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

Cadillac CTS (2011 – 2014) – fuse box diagram

Cadillac CTS (2011 – 2014) – fuse box diagram

Year of production: 2011, 2012, 2013, 2014

Engine compartment (CTS Coupe and Sedan)

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

Cadillac CTS mk2 - fuse box - engine compartment (CTS Coupe and Sedan)
Cadillac CTS mk2 – fuse box – engine compartment (CTS Coupe and Sedan)
Mini-Fuses Usage
11 Not Used
19 Antilock Braking System (ABS)
22 Display
23 Not Used
24 Body Control Module 1
25 Automatic Forward Lighting System (HID Only)
26 Body Control Module 5
27 Body Control Module 4
28 Navigation Motor
29 All-Wheel Drive
30 Transmission Control Module Battery
31 Horn
33 Left Low‐Beam Headlamp (Domestic Non‐HID Only)
34 Pedestrian Protection System (Export Only)
35 Body Control Module 3
36 Body Control Module 2
38 Headlamp Washer (HID Only)
40 Right Low‐Beam Headlamp (Domestic Non‐HID Only)
41 Air Conditioning Compressor Clutch
43 Low‐Beam Daytime Running Lamps (non‐HID), Left Daytime Running Lamps (HID), Left Trailer Turn Signal (Export Only)
46 Left High‐Beam Headlamp
47 Right High‐Beam Headlamp
50 Right Daytime Running Lamp, Windshield Washer Pump
51 Airbag System Ignition Switch
52 Engine Control Module Ignition, Transmission Control Module Ignition
54 Power Moding (Immobilizer Module, Ignition Switch)
55 Not Used
56 Windshield Wipers
57 Right Low‐Beam (HID Only)
58 Daytime Running Lamps (non‐HID), Left Low‐Beam (HID Only)
59 Right Daytime Running Lamp (HID Only), Right Trailer Turn Signal (Export Only)
60 Instrument Panel Auxiliary Power Outlet
61 Air Quality Sensor, Inside Rear View Mirror, Rear Camera
62 Ignition
64 Steering Wheel Illumination
65 Front Fog Lamps (HID Only)
69 Body Control Module 6, Body Control Module 7
70 Emissions 1
71 Even Ignition Coils
72 Engine Control Module
73 Emissions 2
74 Odd Ignition Coils
75 Transmission Output Speed Sensor, Brake Vacuum Relay
76 Spare
77 Spare
78 Spare
79 Spare
80 Spare
81 Spare

 

J-Case Fuses Usage
6 Cooling Fan 2
7 Cooling Fan 1
8 Starter
9 Brake Vacuum Pump
10 Antilock Brake System Motor
13 Not Used
14 Electric Parking Brake
15 Not Used
16 Not Used
17 Blower Motor
18 Rear Window Defogger
37 Not Used

 

Relays Usage
1 Cooling Fan 2
2 Cooling Fan 1
3 Starter
4 Rear Window Defogger
5 Instrument Panel Auxiliary Power Outlet
12 Horn
20 Headlamp Washer (HID Only)
21 Cooling Fan (Series/Parallel)
32 Air Conditioning Compressor Clutch
39 Windshield Washer Pump
42 Right Daytime Running Lamp, Trailer Turn Signal
44 Low‐Beam (non‐HID), Left Daytime Running Lamps (HID), Left Trailer Turn Signal (Export Only)
45 Front Fog Lamps (HID Only)
48 High‐Beam Headlamps
49 Daytime Running Lamps (Non‐HID), Low‐Beam Headlamps (HID)
53 Not Used
63 Main Ignition
66 Windshield Wipers
67 Powertrain
68 Windshield Wipers High Speed

 

Engine compartment (CTS V Coupe and Sedan)

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

Cadillac CTS mk2 - fuse box - engine compartment (CTS V Coupe and Sedan)
Cadillac CTS mk2 – fuse box – engine compartment (CTS V Coupe and Sedan)
Mini-Fuses Usage
11 Not used
19 Antilock Braking System (ABS)
22 Display
23 Sunroof
24 Body Control Module 1
25 Automatic Forward Lighting System (HID Only)
26 Body Control Module 5
27 Body Control Module 4
28 Navigation Motor
29 Not used
30 Transmission Control Module Battery
31 Horn
33 Not Used
34 Pedestrian Protection System (Export Only)
35 Body Control Module 3
36 Body Control Module 2
38 Headlamp Washer (HID Only)
40 Not Used
41 Air Conditioning Compressor Clutch
43 Left Daytime Running Lamps (HID)
46 Left High‐Beam Headlamp
47 Right High‐Beam Headlamp
50 Right Daytime Running Lamp, Windshield Washer Pump
51 Airbag System Ignition Switch
52 Engine Control Module Ignition, Transmission Control Module Ignition
54 Power Moding (Immobilizer Module, Ignition Switch)
55 Intercooler Pump
56 Windshield Wipers
57 Right Low‐Beam (HID Only)
58 Left Low‐Beam (HID Only)
59 Right Daytime Running Lamp (HID Only)
60 Instrument Panel Auxiliary Power Outlet
61 Air Quality Sensor, Inside Rear View Mirror, Rear Camera
62 Ignition
64 Steering Wheel Illumination
65 Front Fog Lamps (HID Only)
69 Body Control Module 6, Body Control Module 7
70 Emissions 1
71 Even Ignition Coils
72 Odd Ignition Coils
73 Emissions 2
74 Engine Control Module
75 Not Used
76 Spare
77 Spare
78 Spare
79 Spare
80 Spare
81 Spare

 

J-Case Fuses Usage
6 Cooling Fan 2
7 Cooling Fan 1
8 Starter
9 Not Used
10 Antilock Brake System Motor
13 Not Used
14 Electric Parking Brake
15 Not Used
16 Not Used
17 Blower Motor
18 Rear Window Defogger
37 Magnetic Ride/Suspension Control

 

 

Relays Usage
1 Cooling Fan 2
2 Cooling Fan 1
3 Starter
4 Rear Window Defogger
5 Instrument Panel Auxiliary Power Outlet
12 Horn
20 Headlamp Washer (HID Only)
21 Cooling Fan (Series/Parallel)
32 Air Conditioning Compressor Clutch
39 Windshield Washer Pump
42 Right Daytime Running Lamp
44 Left Daytime Running Lamp (HID)
45 Front Fog Lamps (HID Only)
48 High‐Beam Headlamps
49 Low‐Beam Headlamps (HID)
53 Not Used
63 Main Ignition
66 Windshield Wipers
67 Powertrain
68 Windshield Wipers High Speed

Engine Compartment (CTS Wagon)

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

Cadillac CTS mk2 - fuse box - engine compartment (CTS Wagon)
Cadillac CTS mk2 – fuse box – engine compartment (CTS Wagon)
Mini-Fuses Usage
11 Not Used
19 Antilock Braking System (ABS)
22 Display
23 Not Used
24 Body Control Module 1
25 Automatic Forward Lighting System (HID Only)
26 Body Control Module 5
27 Body Control Module 4
28 Navigation Motor
29 All-Wheel Drive
30 Transmission Control Module Battery
31 Horn
33 Left Low‐Beam Headlamp (Domestic Non‐HID Only)
34 Pedestrian Protection System (Export Only)
35 Body Control Module 3
36 Body Control Module 2
38 Headlamp Washer (HID Only)
40 Right Low‐Beam Headlamp (Domestic Non‐HID Only)
41 Air Conditioning Compressor Clutch
43 Low‐Beam Daytime Running Lamps (non‐HID), Left Daytime Running Lamps (HID), Left Trailer Turn Signal (Export Only)
46 Left High‐Beam Headlamp
47 Right High‐Beam Headlamp
50 Right Daytime Running Lamp
51 Airbag System Ignition Switch
52 Engine Control Module Ignition, Transmission Control Module Ignition
54 Power Moding (Immobilizer Module, Ignition Switch)
55 Not Used
56 Windshield Wipers
57 Right Low‐Beam (HID Only)
58 Daytime Running Lamps (non‐HID), Left Low‐Beam (HID Only)
59 Right Daytime Running Lamp (HID Only), Right Trailer Turn Signal (Export Only)
60 Instrument Panel Auxiliary Power Outlet
61 Air Quality Sensor, Inside Rear View Mirror, Rear Camera
62 Ignition
64 Steering Wheel Illumination
65 Front Fog Lamps (HID Only)
69 Body Control Module 6, Body Control Module 7
70 Emissions 1
71 Even Ignition Coils
72 Engine Control Module
73 Emissions 2
74 Odd Ignition Coils
75 Transmission Output Speed Sensor, Brake Vacuum Relay
76 Spare
77 Spare
78 Spare
79 Spare
80 Spare
81 Spare

 

J-Case Fuses Usage
6 Cooling Fan 2
7 Cooling Fan 1
8 Starter
9 Brake Vacuum Pump
10 Antilock Brake System Motor
13 Not Used
14 Electric Parking Brake
15 Not Used
16 Not Used
17 Blower Motor
18 Transmission Control Module Battery
37 Trailer (Export Only)

 

Relays Usage
1 Cooling Fan 2
2 Cooling Fan 1
3 Starter
4 Rear Window Defogger
5 Instrument Panel Auxiliary Power Outlet
12 Horn
20 Headlamp Washer (HID Only)
21 Cooling Fan (Series/Parallel)
32 Air Conditioning Compressor Clutch
39 Not used
42 Right Daytime Running Lamp, Trailer Turn Signal
44 Low‐Beam (non‐HID), Left Daytime Running Lamps (HID), Left Trailer Turn Signal (Export Only)
45 Front Fog Lamps (HID Only)
48 High‐Beam Headlamps
49 Daytime Running Lamps (Non‐HID), Low‐Beam Headlamps (HID)
53 Not Used
63 Main Ignition
66 Windshield Wipers
67 Powertrain
68 Windshield Wipers High Speed

Engine Compartment (CTS V Wagon)

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

Cadillac CTS mk2 - fuse box - engine compartment (CTS-V Wagon)
Cadillac CTS mk2 – fuse box – engine compartment (CTS-V Wagon)
Mini-Fuses Usage
11 Not Used
19 Antilock Braking System (ABS)
22 Display
23 Sunroof
24 Body Control Module 1
25 Automatic Forward Lighting System (HID Only)
26 Body Control Module 5
27 Body Control Module 4
28 Navigation Motor
29 Not used
30 Transmission Control Module Battery
31 Horn
33 Not used
34 Pedestrian Protection System (Export Only)
35 Body Control Module 3
36 Body Control Module 2
38 Headlamp Washer (HID Only)
40 Not used
41 Air Conditioning Compressor Clutch
43 Left Daytime Running Lamps (HID)
46 Left High‐Beam Headlamp
47 Right High‐Beam Headlamp
50 Right Daytime Running Lamp
51 Airbag System Ignition Switch
52 Engine Control Module Ignition, Transmission Control Module Ignition
54 Power Moding (Immobilizer Module, Ignition Switch)
55 Intercooler Pump
56 Windshield Wipers
57 Right Low‐Beam (HID Only)
58 Left Low‐Beam (HID Only)
59 Right Daytime Running Lamp (HID Only)
60 Instrument Panel Auxiliary Power Outlet
61 Air Quality Sensor, Inside Rear View Mirror, Rear Camera
62 Ignition
64 Steering Wheel Illumination
65 Front Fog Lamps (HID Only)
69 Body Control Module 6, Body Control Module 7
70 Emissions 1
71 Even Ignition Coils
72 Odd Ignition Coils
73 Emissions 2
74 Engine Control Module
75 Not used
76 Spare
77 Spare
78 Spare
79 Spare
80 Spare
81 Spare

 

J-Case Fuses Usage
6 Cooling Fan 2
7 Cooling Fan 1
8 Starter
9 Not used
10 Antilock Brake System Motor
13 Not Used
14 Electric Parking Brake
15 Not Used
16 Not Used
17 Blower Motor
18 Rear Window Defogger
37 Magnetic Ride/
Suspension Control

 

Relays Usage
1 Cooling Fan 2
2 Cooling Fan 1
3 Starter
4 Rear Window Defogger
5 Instrument Panel Auxiliary Power Outlet
12 Horn
20 Headlamp Washer (HID Only)
21 Cooling Fan (Series/Parallel)
32 Air Conditioning Compressor Clutch
39 Not used
42 Right Daytime Running Lamp
44 Left Daytime Running Lamps (HID)
45 Front Fog Lamps (HID Only)
48 High‐Beam Headlamps
49 Low‐Beam Headlamps (HID)
53 Not Used
63 Main Ignition
66 Windshield Wipers
67 Powertrain
68 Windshield Wipers High Speed

 

Rear Compartment Fuse Block (CTS Coupe and Sedan)

The rear compartment fuse block is located on top of the battery, on the right side of the trunk. The battery access door must be removed to access the fuse block.

Cadillac CTS mk2 - fuse box - rear compartment (CTS Coupe and Sedan)
Cadillac CTS mk2 – fuse box – rear compartment (CTS Coupe and Sedan)
Relays Usage
5 Stop Lamps (Export Only)
6 Door Lock
7 Door Unlock
8 Fuel Door Unlock (Export Only)
9 Right Position Lamp (Export Only)
10 Console/Auxiliary Power Outlet
11 Trunk Release
12 Side Marker Lamps
13 Left Position Lamps

 

Mini-Fuses Usage
14 Right Position Lamp
15 Left Position Lamp
16 Door Lock
17 Console/Auxiliary Power Outlet
18 Rear Fog/Export Body Control Module (Export Only)
19 Trunk Release
20 Easy Entry Seats (Coupe Only)
21 Sunroof
22 Right Position Lamp (Export Only)
23 Regulated Voltage Control Sensor
24 Audio System (Radio)
25 Airbag System
26 Remote Keyless Entry/PASS‐Key® Theft Deterrent Module
27 Audio Speakers/Subwoofer
28 OnStar® System
29 Engine Control Module
30 Canister Vent
31 Fuel Pump
33 Stop Lamps (Export Only)
34 Theft Deterrent System/Universal Garage Door Opener
35 Memory Seat Module
36 Passenger Door Module
38 Not Used
39 Amplifier

 

Circuit Breakers Usage
1 Driver Power Seat Switch
2 Passenger Power Seat Switch
3 Power Windows
4 Power Steering Column
32 Left Rear Window Switch
37 Right Rear Window Switch

 

Rear Compartment Fuse Block (CTS-V Coupe and Sedan)

The rear compartment fuse block is located on top of the battery, on the right side of the trunk. The battery access door must be removed to access the fuse block.

Cadillac CTS mk2 - fuse box - rear compartment (CTS-V Coupe and Sedan)
Cadillac CTS mk2 – fuse box – rear compartment (CTS-V Coupe and Sedan)
Relays Usage
5 Stop Lamps (Export Only)
6 Door Lock
7 Door Unlock
8 Fuel Door Unlock (Export Only)
9 Right Position Lamp (Export Only)
10 Console/Auxiliary Power Outlet
11 Trunk Release
12 Side Marker Lamps
13 Left Position Lamps

 

Mini-Fuses Usage
14 Right Position Lamp
15 Left Position Lamp
16 Door Lock
17 Console/Auxiliary Power Outlet
18 Rear Fog/Export Body Control Module (Export Only)
19 Trunk Release
20 Easy Entry Seats (Coupe Only)
21 Fuel Pump
22 Right Position Lamp (Export Only)
23 Regulated Voltage Control Sensor
24 Audio System (Radio)
25 Airbag System
26 Remote Keyless Entry/PASS‐Key® Theft Deterrent Module
27 Audio Speakers/Subwoofer
28 OnStar® System
29 Engine Control Module
30 Canister Vent
31 Rear Differential Cooling Pump
33 Stop Lamps (Export Only)
34 Theft Deterrent System/Universal Garage Door Opener
35 Memory Seat Module
36 Passenger Door Module
38 Not Used
39 Amplifier

 

Circuit Breakers Usage
1 Driver Power Seat Switch
2 Passenger Power Seat Switch
3 Power Windows
4 Power Steering Column
32 Left Rear Window Switch
37 Right Rear Window Switch

 

Rear Compartment Fuse Block (CTS Wagon)

The rear compartment fuse block is located on top of the battery, on the right side of the trunk. The battery access door must be removed to access the fuse block.

Cadillac CTS mk2 - fuse box - rear compartment (CTS Wagon)
Cadillac CTS mk2 – fuse box – rear compartment (CTS Wagon)
Relays Usage
5 Stop Lamps (Export Only)
6 Door Lock
7 Door Unlock
8 Fuel Door Unlock (Export Only)
9 Right Position Lamp (Export Only)
10 Console/Auxiliary Power Outlet
11 Not used
12 Side Marker Lamps
13 Left Position Lamps

 

Mini-Fuses Usage
14 Right Position Lamp
15 Left Position Lamp
16 Door Lock
17 Console/Auxiliary Power Outlet
18 Rear Fog/Export Body Control Module (Export Only)
19 Rear Windshield Wiper/Washer
20 Windshield Washer Pump
21 Sunroof
22 Right Position Lamp (Export Only)
23 Regulated Voltage Control Sensor
24 Audio System (Radio)
25 Airbag System
26 Remote Keyless Entry/PASS‐Key® Theft Deterrent Module
27 Audio Speakers/Subwoofer
28 OnStar® System
29 Engine Control Module
30 Canister Vent
31 Fuel Pump
33 Stop Lamps (Export Only)
34 Theft Deterrent System/Universal Garage Door Opener
35 Memory Seat Module
36 Passenger Door Module
38 Rear Auxiliary Power Outlet
39 Amplifier

 

Circuit Breakers Usage
1 Driver Power Seat Switch
2 Passenger Power Seat Switch
3 Power Windows
4 Power Steering Column
32 Left Rear Window Switch
37 Right Rear Window Switch

 

Rear Compartment Fuse Block (CTS-V Wagon)

The rear compartment fuse block is located on top of the battery, on the right side of the trunk. The battery access door must be removed to access the fuse block.

Cadillac CTS mk2 - fuse box - rear compartment (CTS-V Wagon)
Cadillac CTS mk2 – fuse box – rear compartment (CTS-V Wagon)
Relays Usage
5 Stop Lamps (Export Only)
6 Door Lock
7 Door Unlock
8 Fuel Door Unlock (Export Only)
9 Right Position Lamp (Export Only)
10 Console/Auxiliary Power Outlet
11 Not used
12 Side Marker Lamps
13 Left Position Lamps

 

Mini-Fuses Usage
14 Right Position Lamp
15 Left Position Lamp
16 Door Lock
17 Console/Auxiliary Power Outlet
18 Rear Fog/Export Body Control Module (Export Only)
19 Rear Windshield Wiper/Washer
20 Windshield Washer Pump
21 Fuel Pump
22 Right Position Lamp (Export Only)
23 Regulated Voltage Control Sensor
24 Audio System (Radio)
25 Airbag System
26 Remote Keyless Entry/PASS‐Key® Theft Deterrent Module
27 Audio Speakers/Subwoofer
28 OnStar® System
29 Engine Control Module
30 Canister Vent
31 Rear Differential Cooling Pump
33 Stop Lamps (Export Only)
34 Theft Deterrent System/Universal Garage Door Opener
35 Memory Seat Module
36 Passenger Door Module
38 Rear Auxiliary Power Outlet
39 Amplifier

 

Circuit Breakers Usage
1 Driver Power Seat Switch
2 Passenger Power Seat Switch
3 Power Windows
4 Power Steering Column
32 Left Rear Window Switch
37 Right Rear Window Switch

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

Cadillac CTS (2010) – fuse box diagram

Cadillac CTS (2010) – fuse box diagram

Year of production: 2010

Underhood Fuse Block (CTS-V)

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

Fuses Usage
A/C CLTCH Air Conditioning Clutch
ABS Antilock Braking System (ABS)
AFS Adaptive Forward Lighting System
AIRBAG IGN Airbag Switch
AQS/ISRVM/REAR CAMERA Air Quality Sensor/Inside Rear ViewMirror/Rear View Camera
BCM 1 Body Control Module 1
BCM 2 Body Control Module 2
BCM 3 Body Control Module 3
BCM 4 Body Control Module 4
BCM 5 Body Control Module 5
BCM 6, BCM 7 Body Control Module 6 and 7
DISPLY Display
DRL RT Right Daytime Running Lamp
DRL/WSW Daytime Running Lamps/Windshield Washer Pump
ECM Engine Control Module (ECM)
ECM/TCM IGN ECM, Transmission Control Module (TCM), Instrument Panel Cluster (IPC), PASS-Key III+ Module
EMIS 1 Emission 1
EMIS 2 Emission 2
EVEN COILS Even Coils
FRT FOG Front Fog Lamps
HORN Horn
INTCLR Intercooler Pump
LT HI BEAM Left High-Beam Headlamp
LT LO BEAM Left Low-Beam Headlamp
LTR Cigarette Lighter
MISC IGN Ignition
NAV MTR Navigation Motor
ODD COILS Odd Coils
PED PROT Not Used
PWR MODING PassKey Module, Body Control Module
RT HI BEAM Right High-Beam Headlamp
RT LO BEAM Right Low-Beam Headlamp
SPARE Spare
STR/WHL/CNTRL Steering Wheel Illumination
S/ROOF Sunroof
TCM BATT Transmission Control Module Battery
WPR Windshield Wiper

 

J Cases Usage
ABS MTR ABS Motor
BLWR Blower
EPB Electric Park Brake
FAN 1 Cooling Fan 1
FAN 2 Cooling Fan 2
REAR DEFOG Rear Defogger
SPARE Spare
EPB Electric Park Brake
STRTR Starter
SPARE Spare
WSW/HTR Not used

 

Relays Usage
A/C CMPRSR Air Conditioning Compressor Clutch
FAN S/P Cooling Fan Series/Parallel
FAN 1 Cooling Fan 1
FAN 2 Cooling Fan 2
FOG LAMP Fog Lamps
HDLP WASH Headlamp Washer
HI BEAM High-Beam Headlamp
HORN Horn
IGN 1 Ignition 1
INTCLR Intercooler Pump
LT DRL Left Daytime Running Lamps
LO BEAM Low Beam
PWR/TRN Powertrain
REAR DEFOG Rear Defogger
RT DRL Right Daytime Running Lamp
SPARE Spare
STRTR Starter
WPR Windshield Wiper
WPR HI Windshield Wiper High Speed
WSW Daytime Running Lamps/Windshield Washer Pump

Underhood Fuse Block (CTS Wagon)

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

Fuses Usage
A/C CLTCH Air Conditioning Clutch
ABS Antilock Braking System (ABS)
AFS Adaptive Forward Lighting System
AIRBAG IGN Airbag Switch
AQS/ISRVM/REAR CAMERA Air Quality Sensor/Inside Rear ViewMirror/Rear View Camera
AWD All-Wheel Drive
BCM 1 Body Control Module 1
BCM 2 Body Control Module 2
BCM 3 Body Control Module 3
BCM 4 Body Control Module 4
BCM 5 Body Control Module 5
BCM 6, BCM 7 Body Control Module 6 and 7
DISPLY Display
DRL RT Right Daytime Running Lamp
DRL/LT LO BEAM Daytime Running Lamps/Left Low-Beam Headlamp
DRL/WSW Daytime Running Lamps/Windshield Washer Pump
ECM Engine Control Module (ECM)
ECM/TCM IGN ECM, Transmission Control Module (TCM), Instrument Panel Cluster (IPC), PASS-Key III+ Module
EMIS 1 Emission 1
EMIS 2 Emission 2
EVEN COILS Even Coils
FRT FOG Front Fog Lamps
HDLP WASH Headlamp Washer
HORN Horn
LO BEAM DRL LEFT Low-Beam Daytime Running Lamps (Left)
LT HI BEAM Left High-Beam Headlamp
LT LO BEAM Left Low-Beam Headlamp
LTR Cigarette Lighter
MISC IGN Ignition
NAV MTR Navigation Motor
ODD COILS Odd Coils
PED PROT Not Used
PWR MODING PassKey Module, Body Control Module
PWR OUTLET Console Auxiliary Power Outlet
RT HI BEAM Right High-Beam Headlamp
RT LO BEAM Right Low-Beam Headlamp
RT LO BEAM Right Low-Beam Headlamp
SPARE Spare
STR/WHL/CNTRL Steering Wheel Illumination
TCM BATT Transmission Control Module Battery
TOSS/BRK VAC RLY Transmission Output Speed Sensor/Brake Vacuum Relay
WPR Windshield Wiper

 

J Cases Usage
ABS MTR ABS Motor
BLWR Blower
BRK VAC PUMP Brake Vacuum Pump
EPB Electric Park Brake
FAN 1 Cooling Fan 1
FAN 2 Cooling Fan 2
REAR DEFOG Rear Defogger
SPARE Spare
STRTR Starter
TRLR Trailer Towing
WSW/HTR Not used

 

Relays Usage
A/C CMPRSR Air Conditioning Compressor Clutch
DRL (W/O HID) LO BEAM (HID) Daytime Running Lamps (without High Intensity Discharge), Low-Beam Headlamps (High Intensity Discharge)
FAN S/P Cooling Fan Series/Parallel
FAN 1 Cooling Fan 1
FAN 2 Cooling Fan 2
FOG LAMP Fog Lamps
HDLP WASH Headlamp Washer
HI BEAM High-Beam Headlamp
HORN Horn
IGN 1 Ignition 1
LO BEAM (W/O HID) LT DRL (HID) Low-Beam (without High Intensity Discharge), Left Daytime Running Lamp (High Intensity Discharge)
PWR/TRN Powertrain
REAR DEFOG Rear Defogger
RT DRL (HID) Right Daytime Running Lamp (High Intensity Discharge)
SPARE Spare
STRTR Starter
WPR Windshield Wiper
WPR HI Windshield Wiper High Speed

 

Rear Compartment Fuse Block (CTS)

The rear compartment fuse block is located on top of the battery, on the right side of the trunk. The battery access door must be removed to access the fuse block.

 

Relay Usage
FUEL/PUMP Fuel Pump
LCK Lock
LT/POS/LP Left Position Lamp
MRKR/LP Not Used
REAR/FOG Not Used
RT/POS/LP Not Used
STOP/LP Not Used
TRUNK/RELSE Trunk Release
UNLCK Unlock

 

Mini-fuses Usage
AIRBAG Airbag System
AMP Amplifier
AUX/OUTLET Auxiliary Power Outlet
CNSTR/VENT Canister Vent
DR/LCK Door Lock
ECM Engine Control Module (ECM)
EE SEAT Not Used
FUEL/PUMP Fuel Pump
LT/POS/LP Left Position Lamp
MSM Memory Seat Module
ONSTAR OnStar® System
PDM Passenger Door Module
RDO Audio System
RDO/SPKR Audio Speakers
REAR/FOG Not Used
RKE/PASS-KEY/MDL Remote Keyless Entry System, Pass-Key Theft Deterrent Feature Module
RT/POS/LP Not Used
RT/POS/LP Right Position Lamp
RVC/SNSR Regulated Voltage Control Sensor
S/ROOF Sunroof
STOP/LP Not Used
THEFT/UGDO Theft Deterrent System, Universal Home Remote System
TRUNK/RELSE Trunk Release

 

Circuit Breakers Usage
DRV/PWR/SEAT Left Front Power Seat
LT/ REAR/ WNDW Left Rear Window
PWR CLMN Power Steering Column
PWR/WNDW Power Window
PASS/ PWR/SEAT Right Front Power Seat
REAR/WNDW Right Rear Window

 

Rear Compartment Fuse Block (CTS-V)

The rear compartment fuse block is located on top of the battery, on the right side of the trunk. The battery access door must be removed to access the fuse block.

Relay Usage
FUEL/PUMP Fuel Pump
LCK Lock
LT/POS/LP Left Position Lamp
MRKR/LP Not Used
REAR/FOG Not Used
RT/POS/LP Not Used
STOP/LP Not Used
TRUNK/RELSE Trunk Release
UNLCK Unlock

 

Mini-fuses Usage
AIRBAG Airbag System
AMP Amplifier
AUX/OUTLET Auxiliary Power Outlet
CNSTR/VENT Canister Vent
DR/LCK Door Lock
ECM Engine Control Module (ECM)
EE SEAT Not Used
FUEL/PUMP Fuel Pump
LT/POS/LP Left Position Lamp
MSM Memory Seat Module
ONSTAR OnStar® System
PDM Passenger Door Module
RDO Audio System
RDO/SPKR Audio Speakers
REAR/DIFF/PUMP Rear Differential Cooling Pump
REAR/FOG Not Used
RKE/PASS-KEY/MDL Remote Keyless Entry System, Pass-Key Theft Deterrent Feature Module
RT/POS/LP Right Position Lamp
RT/POS/LP Not used
RVC/SNSR Regulated Voltage Control Sensor
SPARE Spare
STOP/LP Not Used
THEFT/UGDO Theft Deterrent System, Universal Home Remote System
TRUNK/RELSE Trunk Release

 

Circuit Breakers Usage
DRV/PWR/SEAT Left Front Power Seat
LT/ REAR/ WNDW Left Rear Window
PASS/PWR/SEAT Right Front Power Seat
PWR CLMN Power Steering Column
PWR/WNDW Power Window
REAR/WNDW Right Rear Window

Rear Compartment Fuse Block (Wagon)

The rear compartment fuse block is located on top of the battery, on the right side of the trunk. The battery access door must be removed to access the fuse block.

Relay Usage
FUEL/PUMP Fuel Pump
LCK Lock
LT/POS/LP Left Position Lamp
MRKR/LP Not Used
REAR/FOG Not Used
RT/POS/LP Not Used
STOP/LP Not Used
TRUNK/RELSE Trunk Release
UNLCK Unlock

 

Mini-fuses Usage
AIRBAG Airbag System
AMP Amplifier
AUX/OUTLET Auxiliary Power Outlet
CNSTR/VENT Canister Vent
DR/LCK Door Lock
ECM Engine Control Module (ECM)
FUEL/PUMP Fuel Pump
LT/POS/LP Left Position Lamp
MSM Memory Seat Module
ONSTAR OnStar® System
PDM Passenger Door Module
RDO Audio System
RDO/SPKR Audio Speakers
REAR/FOG Not Used
RKE/PASS-KEY/MDL Remote Keyless Entry System, Pass-Key Theft Deterrent Feature Module
RT/POS/LP Not Used
RT/POS/LP Right Position Lamp
RVC/SNSR Regulated Voltage Control Sensor
S/ROOF Sunroof
STOP/LP Not Used
TRLR/POS/LP Trailer Turn Position Lamps
WASH/PUMP Windshield Washer Pump

 

Circuit Breakers Usage
DRV/PWR/SEAT Left Front Power Seat
LT/ REAR/ WNDW Left Rear Window
PASS/PWR/SEAT Right Front Power Seat
PWR CLMN Power Steering Column
PWR/WNDW Power Window
REAR/WNDW Right Rear Window

 

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

Cadillac CTS (2009) – fuse box diagram

Cadillac CTS (2009) – fuse box diagram

Year of production: 2009

Underhood Fuse Block (CTS)

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

Cadillac CTS mk2 - fuse box - engine compartment (CTS)
Cadillac CTS mk2 – fuse box – engine compartment (CTS)
Fuses Usage
A/C CLTCH Air Conditioning Clutch
ABS Antilock Braking System (ABS)
AFS Adaptive Forward Lighting System
AIRBAG IGN Airbag Switch
AWD All-Wheel Drive
BCM 1 Body Control Module 1
BCM 2 Body Control Module 2
BCM 3 Body Control Module 3
BCM 4 Body Control Module 4
BCM 5 Body Control Module 5
SPARE Spare
BCM 6, BCM 7 Body Control Module 6 and 7
DISPLY Display
DRL RT Right Daytime Running Lamp (DRL)
DRL/WSW Daytime Running Lamps/Windshield Washer Pump
ECM Engine Control Module (ECM)
ECM/TCM IGN ECM, Transmission Control Module (TCM), Instrument Panel
Cluster (IPC), PASS-Key III+ Module
EMIS 1 Emission 1
EMIS 2 Emission 2
EVEN COILS Even Coils
FRT FOG Front Fog Lamps
HORN Horn
LO BEAM DRL LEFT Low-Beam Daytime Running Lamps (Left)
LT HI BEAM Left High-Beam Headlamp
LT LO BEAM Left Low-Beam Headlamp
DRL/LT LO BEAM Daytime Running Lamps / Left Low-Beam Headlamp
LTR Cigarette Lighter
MISC IGN Ignition
NAV MTR Navigation Motor
ODD COILS Odd Coils
PED PROT Not Used
PWR MODING PASS-Key III+ Module, Body Control Module
RT HI BEAM Right High-Beam Headlamp
RT LO BEAM Right Low-Beam Headlamp
RT LO BEAM Right Low-Beam Headlamp
SPARE Spare
SPARE Spare
STR/WHL/ILLUM Steering Wheel Illumination
TCM BATT Transmission Control Module Battery
MAN SPD SNSR Manual Speed Sensor
WPR Windshield Wiper
ENG PUMP Engine Pump

 

J Cases Usage
ABS MTR ABS Motor
BLWR Blower
BRK VAC PUMP Brake Vacuum Pump
FAN 1 Cooling Fan 1
FAN 2 Cooling Fan 2
REAR DEFOG Rear Defogger
SPARE Spare
EPB Electric Park Brake
SPARE Spare
STRTR Starter
SPARE Spare
WSW/HTR Windshield Washer Heater

 

Relays Usage
A/C CMPRSR CLTCH Air Conditioning Compressor Clutch
DRL (W/O HID) LO BEAM (HID) Daytime Running Lamps (without High Intensity Discharge), Low-Beam Headlamps (High Intensity Discharge)
ENG PUMP Engine Pump
FAN S/P Cooling Fan Series/Parallel
FAN 1 Cooling Fan 1
FAN 2 Cooling Fan 2
HI BEAM High-Beam Headlamp
HORN Horn
IGN 1 Ignition 1
LO BEAM (W/O HID) LT DRL (HID) Low-Beam (without High Intensity Discharge), Left Daytime Running Lamp (High Intensity Discharge)
PWR/TRN Powertrain
REAR DEFOG Rear Defogger
SPARE Spare
STRTR Starter
WPR Windshield Wiper
WPR HI Windshield Wiper High Speed
WSW PUMP Windshield Washer Pump
FOG LAMP Fog Lamps
RT DRL (HID) Right Daytime Running Lamp (High Intensity Discharge)

 

Circuit Breakers Usage
HEAD LAMP WASH Headlamp Washer

Underhood Fuse Block (CTS-V)

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

Cadillac CTS mk2 - fuse box - engine compartment (CTS-V)
Cadillac CTS mk2 – fuse box – engine compartment (CTS-V)
Mini – Fuses Usage
A/C CLTCH Air Conditioning Clutch
ABS Antilock Braking System (ABS)
AFS Adaptive Forward Lighting System
AIRBAG IGN Airbag Switch
S/ROOF Sunroof
BCM 1 Body Control Module 1
BCM 2 Body Control Module 2
BCM 3 Body Control Module 3
BCM 4 Body Control Module 4
BCM 5 Body Control Module 5
SPARE Spare
BCM 6, BCM 7 Body Control Module 6 and 7
DISPLY Display
DRL RT Right Daytime Running Lamp (DRL)
DRL/WSW Daytime Running Lamps/Windshield Washer Pump
ECM Engine Control Module (ECM)
ECM/TCM IGN ECM, Transmission Control Module (TCM), Instrument Panel
Cluster (IPC), PASS-Key III+ Module
EMIS 1 Emission 1
EMIS 2 Emission 2
EVEN COILS Even Coils
FRT FOG Front Fog Lamps
HORN Horn
DRL LT Left Daytime Running Lamps
LT HI BEAM Left High-Beam Headlamp
SPARE Spare
LT LO BEAM Left Low-Beam Headlamp
LTR Cigarette Lighter
MISC IGN Ignition
NAV MTR Navigation Motor
ODD COILS Odd Coils
PED PRO Not Used
PWR MODING PASS-Key III+ Module, Body Control Module
RT HI BEAM Right High-Beam Headlamp
RT LO BEAM Right Low-Beam Headlamp
SPARE Spare
SPARE Spare
SPARE Spare
STR/WHL/ILLUM Steering Wheel Illumination
TCM BATT Transmission Control Module Battery
SPARE Spare
WPR Windshield Wiper
INCLR Intercooler Pump

 

J Cases Usage
ABS MTR ABS Motor
BLWR Blower
SPARE Spare
FAN 1 Cooling Fan 1
FAN 2 Cooling Fan 2
REAR DEFOG Rear Defogger
SPARE Spare
EPB Electric Park Brake
MRTD MR Ride/Suspension Control
STRTR Starter
SPARE Spare
WSW/HTR Windshield Washer Heater

 

Relays Usage
A/C CMPRSR CLTCH Air Conditioning Compressor Clutch
LO BEAM Low Beam
INCL Intercooler Pump
FAN S/P Cooling Fan Series/Parallel
FAN 1 Cooling Fan 1
FAN 2 Cooling Fan 2
HI BEAM High-Beam Headlamp
HORN Horn
IGN 1 Ignition 1
LT DRL Left Daytime Running Lamps
PWR/TRN Powertrain
REAR DEFOG Rear Defogger
SPARE Spare
STRTR Starter
WPR Windshield Wiper
WPR HI Windshield Wiper High Speed
DRL/WSW Daytime Running Lamps/Windshield Washer Pump
FOG LAMP Fog Lamps
RT DRL Right Daytime Running Lamp

 

Circuit Breakers Usage
HEAD LAMP WASH Headlamp Washer

Rear Compartment Fuse Block (CTS)

The rear compartment fuse block is located on top of the battery, on the right side of the trunk. The battery access door must be removed to access the fuse block.

Cadillac CTS mk2 - fuse box - rear compartment (CTS)
Cadillac CTS mk2 – fuse box – rear compartment (CTS)
Relay Usage
FUEL/PUMP Fuel Pump
LCK Lock
LT/POS/LP Left Position Lamp
REAR/FOG Not Used
RT/POS/L Right Position Lamp
FUEL/DR/RELSE Not Used
STOP/LP Stoplamp
TRUNK/RELSE Trunk Release
UNLCK Unlock

 

Mini-fuses Usage
AIRBAG Airbag System
AMP Amplifier
AUX/OUTLET Auxiliary Power Outlet
CNSTR/VENT Canister Vent
DR/LCK Door Lock
ECM Engine Control Module (ECM)
FUEL/PUMP Fuel Pump
LT/POS/LP Left Position Lamp
MSM Memory Seat Module
ONSTAR OnStar® System
PDM Passenger Door Module
RDO Audio System
RDO/SPKR Audio Speakers
REAR/FOG Not Used
RKE/PASS-KEY/MDL Remote Keyless Entry System, Pass-Key Theft Deterrent Feature Module
RT/POS/LP Right Position Lamp
RT/POS/LP Right Position Lamp
RVC/SNSR Regulated Voltage Control Sensor
S/ROOF Sunroof
SPARE Spare
SPARE Spare
STOP/LP Stoplamp
THEFT/UGDO Theft Deterrent System, Universal Home Remote System
TRUNK/RELSE Trunk Release

 

Circuit Breakers Usage
LF FRT/ PWR/SEAT Left Front Power Seat
PWR CLMN Power Steering Column
PWR/WNDW Power Window
RT FRT/PWR/SEAT Right Front Power Seat
LT/REAR/WNDW Left Rear Window
REAR/WNDW Right Rear Window

 

Rear Compartment Fuse Block (CTS-V)

The rear compartment fuse block is located on top of the battery, on the right side of the trunk. The battery access door must be removed to access the fuse block.

Cadillac CTS mk2 - fuse box - rear compartment (CTS-V)
Cadillac CTS mk2 – fuse box – rear compartment (CTS-V)
Relay Usage
FUEL/PUMP Fuel Pump
LCK Lock
LT/POS/LP Left Position Lamp
REAR/FOG Not Used
RT/POS/L Right Position Lamp
FUEL/DR/RELSE Not Used
STOP/LP Stoplamp
TRUNK/RELSE Trunk Release
UNLCK Unlock

 

Mini-fuses Usage
AIRBAG Airbag System
AMP Amplifier
AUX/OUTLET Auxiliary Power Outlet
CNSTR/VENT Canister Vent
DR/LCK Door Lock
ECM Engine Control Module (ECM)
FUEL/PUMP Fuel Pump
LT/POS/LP Left Position Lamp
MSM Memory Seat Module
ONSTAR OnStar® System
PDM Passenger Door Module
RDO Audio System
RDO/SPKR Audio Speakers
REAR/FOG Not Used
RKE/PASS-KEY/MDL Remote Keyless Entry System, Pass-Key Theft Deterrent Feature Module
RT/POS/LP Right Position Lamp
RT/POS/LP Right Position Lamp
RVC/SNSR Regulated Voltage Control Sensor
FSCM Fuel System Control Module
SPARE Spare
SPARE Spare
STOP/LP Stoplamp
THEFT/UGDO Theft Deterrent System, Universal Home Remote System
TRUNK/RELSE Trunk Release

 

Circuit Breakers Usage
LF FRT/ PWR/SEAT Left Front Power Seat
PWR CLMN Power Steering Column
PWR/WNDW Power Window
RT FRT/PWR/SEAT Right Front Power Seat
LT/REAR/WNDW Left Rear Window
REAR/WNDW Right Rear Window

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

Cadillac CTS (2008) – fuse box diagram

Cadillac CTS (2008) – fuse box diagram

Year of production: 2008

Underhood Fuse Block

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

Cadillac CTS mk2 fuse box - engine compartment
Cadillac CTS mk2 fuse box – engine compartment
Fuses Usage
A/C CLTCH Air Conditioning Clutch
ABS Antilock Braking System (ABS)
AFS Adaptive Forward Lighting System
AIRBAG IGN Airbag Switch
AWD All-Wheel Drive
BCM 1 Body Control Module 1
BCM 2 Body Control Module 2
BCM 3 Body Control Module 3
BCM 4 Body Control Module 4
BCM 5 Body Control Module 5
BCM 6 Body Control Module 6
BCM 7 Body Control Module 7
DISPLY Display
DRL RT Right Daytime Running Lamp (DRL)
DRL/ENG PUMP Daytime Running Lamps
ECM Engine Control Module (ECM)
ECM/TCM IGN ECM, Transmission Control Module (TCM), Instrument Panel
Cluster (IPC), PASS-Key III+ Module
EMIS 1 Emission 1
EMIS 2 Emission 2
EVEN COILS Even Coils
FRT FOG Front Fog Lamps
HDM WASH Headlamp Driver Module Washer
HORN Horn
LO BEAM DRL Low-Beam DRL
LT HI BEAM Left High-Beam Headlamp
LT LO BEAM Left Low-Beam Headlamp
LT LO BEAM Left Low-Beam Headlamp
LTR Cigarette Lighter
MISC IGN Ignition
NAV MTR Navigation Motor
ODD COILS Odd Coils
PED PROT Not Used
PWR MODING PassKey Module, Body Control Module
RT HI BEAM Right High-Beam Headlamp
RT LO BEAM Right Low-Beam Headlamp
RT LO BEAM Right Low-Beam Headlamp
SPARE Spare
SPARE Spare
STR/WHL/ILLUM Steering Wheel Illumination
TCM BATT Transmission Control Module Battery
TRANS OIL RLY Transmission Oil Relay
WPR Windshield Wiper
WSW PUMP Windshield Washer Pump

 

J Cases Usage
ABS MTR ABS Motor
BLWR Blower
BRK VAC PUMP Brake Vacuum Pump
FAN 1 Cooling Fan 1
FAN 2 Cooling Fan 2
REAR DEFOG Rear Defogger
SPARE Spare
SPARE Spare
SPARE Spare
STRTR Starter
TRANS PUMP Transmission Pump
WSW/HTR Windshield Washer Heater

 

Relays Usage
A/C CMPRSR CLTCH Air Conditioning Compressor Clutch
DRL (W/O HID) LO BEAM (HID) Daytime Running Lamps (without High Intensity Discharge), Low-Beam Headlamps (High Intensity Discharge)
ENG PUMP Engine Pump
FAN S/P Cooling Fan Series/Parallel
FAN 1 Cooling Fan 1
FAN 2 Cooling Fan 2
HEAD LAMP WASH Headlamp Washer
HI BEAM High-Beam Headlamp
HORN Horn
IGN 1 Ignition 1
LO BEAM (W/O HID) LT DRL (HID) Low-Beam (without High Intensity Discharge), Left Daytime Running Lamp (High Intensity Discharge)
PWR/TRN Powertrain
REAR DEFOG Rear Defogger
SPARE Spare
STRTR Starter
WPR Windshield Wiper
WPR HI Windshield Wiper High Speed
WSW PUMP Windshield Washer Pump

Rear Compartment Fuse Block

The rear compartment fuse block is located on top of the battery, on the right side of the trunk. The battery access door must be removed to access the fuse block.

Cadillac CTS mk2 - fuse box - rear compartment
Cadillac CTS mk2 – fuse box – rear compartment
Relay Usage
FUEL/PUMP Fuel Pump
LCK Lock
LF FRT/PWR/SEAT Left Front Power Seat
LF/POS/LP Left Position Lamp
PWR CLMN Power Steering Column
PWR/WNDW Power Window
REAR/FOG Not Used
RT FRT/PWR/SEAT Right Front Power Seat
RT/POS/LP Right Position Lamp
SPARE Spare
STOP/LP Stoplamp
TRUNK/RELSE Trunk Release
UNLCK Unlock

 

Fuses Usage
AIRBAG Airbag System
AMP Amplifier
AUX/OUTLET Auxiliary Power Outlet
CNSTR/VENT Canister Vent
DR/LCK Door Lock
ECM Engine Control Module (ECM)
FUEL/PUMP Fuel Pump
LT/POS/LP Left Position Lamp
LT/REAR/WNDW Left Rear Window
MSM Memory Seat Module
ONSTAR OnStar® System
PDM Passenger Door Module
RDO Audio System
RDO/SPKR Audio Speakers
REAR/FOG Not Used
REAR/WNDW Rear Window
RKE/PASS-KEY/MDL Remote Keyless Entry System, Pass-Key Theft Deterrent Feature Module
RT/POS/LP Right Position Lamp
RT/POS/LP Right Position Lamp
RVC/SNSR Regulated Voltage Control Sensor
S/ROOF Sunroof
SPARE Spare
SPARE Spare
STOP/LP Stoplamp
THEFT/UGDO Theft Deterrent System, Universal Home Remote System
TRUNK/RELSE Trunk Release

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

Cadillac CTS (2005 – 2007) – fuse box diagram

Cadillac CTS (2005 – 2007) – fuse box diagram

Year of production: 2005, 2006, 2007

Underhood Fuse Block

The underhood fuse block is located in the engine compartment on the passenger’s side of the vehicle.

Cadillac CTS mk1 - fuse box - engine compartment
Cadillac CTS mk1 – fuse box – engine compartment
Relays Usage
LO SPEED FAN RELAY MINI Low Speed Fan Motor
HI SPEED FAN RELAY MINI High Speed Fan Motor
ACCESSORY RELAY MINI Accessory Power Outlets
S/P FAN RELAY MINI Series/Parallel Fan
PARK LAMP RELAY MICRO Parking Lamps
HORN RELAY MICRO Horn
HI BEAM RELAY MICRO High-Beam Headlamps
DRL RELAY MICRO – OPT Daytime Running Lamps
LO BEAM RELAY/HID MINI – OPT Low-Beam HID Headlamps (Option)
HDLP WASH RELAY MINI – OPT Headlamp Washer Motor (Option)
SPARE Not used
BLOWER RELAY MINI Front Blower
FOG LAMP RELAY MICRO Fog Lamps
MAIN RELAY MICRO Powertrain/ECM
STARTER RELAY MINI Starter Solenoid
CMP CLU RELAY MICRO Compressor Clutch
IGN-1 RELAY MICRO Ignition Switch (ON)

 

Wiring Harnesses Usage
BODY W/H Wiring Harness Connection
I/P W/H Wiring Harness Connection
ENG W/H Engine Wiring Harness Connection
FORWARD LAMP Forward Lamp Wiring Harness Connection

 

J Cases Usage
R REAR RRPDB (Passenger’s Side Rear Power Distribution Box)
R REAR RRPDB (Passenger’s Side Rear Power Distribution Box)
L REAR LRPDB (Driver’s Side Rear Power Distribution Box)
L REAR LRPDB (Driver’s Side Rear Power Distribution Box)
HI FAN High Cooling Fan Motor
LO FAN Low Cooling Fan Motor
BLOWER PWM Fan Motor Assembly
STARTER Starter Solenoid
ABS Anti-Lock Brake System

 

Fuses Usage
RT PARK Passenger’s Side Taillamp Assembly, Front Sidemarker and Front Parking Lamp Assembly
HORN Dual Horn Assembly
LT HI BEAM Driver’s Side High-Beam Headlamp
LT LOW BEAM Driver’s Side Low-Beam Headlamp
RT LOW BEAM Passenger’s Side Low-Beam Headlamp
RT HI BEAM Passenger’s Side High-Beam Headlamp
TOS Manual Transmission Output Speed Sensor
SPARE Not Used
THEFT ECM (Electronic Control Module), TCM (Transmission Control Module), PASS-Key III+ Module
LT PARK Driver’s Side Taillamp Assembly, Front Sidemarker and Front Parking Lamp Assembly
DIMMING Rear License Plate Assembly, Dash Integrated Module (DIM)
DIM/ALDL DIM, ALDL (Assembly Line Data Link)
FLASHER Turn Signal/Hazard Flasher Module
ECM Electronic Control Module
STRG CTLS Steering Wheel Control Pad, Headlamp Switch
HTR VLV/CLTCH Heater Valve, Clutch Switch (Normal Closed), Clutch Switch (Normal Open), Jumper to Start Relay Coil for Automatic Transmission
WASH NOZ Driver’s and Passenger’s Side Heated Washer Nozzles
PRE O2/CAM Driver’s & Passenger’s Side Oxygen Sensors, Transmission Output Speed Sensor, CAM Phaser
TCM/IPC TCM, ECM and IPC (Instrument Panel Cluster)
SPARE Not Used
IGN MOD/MAF Front Bank Ignition Modules
ELEC PRNDL Electronic PRNDL
SPARE Not Used
SPARE Not Used
IGN SW Ignition Switch (Power to IGN-3 and CRANK)
VOLT CHECK DIM (Dash Integration Module)
ECM/TCM TCM (Transmission Control Module), ECM (Electronic Control Module), IPC (Instrument Panel Cluster), PASS-Key III+ Module
WPR MOD Windshield Wiper Module Assembly
ODD INJ/COILS Odd Ignition Coils, Fuel Injectors, Odd Injection Coils
COMP
CLUTCH
Compressor Clutch
WPR SW Windshield Wiper/Washer Switch
FOG LAMP Fog Lamps
OUTLET Center Console Accessory Power Outlet
POST 02 Driver’s and Passenger’s Side Oxygen Sensors, LRPDB (Pusher Cooling Fan Relay)
I/P OUTLET Instrument Panel Accessory Power Outlet
CCP Climate Control Panel
EVEN INJ/COILS Even Injection Coils
SPARE Not Used
SPARE Not Used
SPARE Not Used

 

Circuit Breakers Usage
HDLP WASH C/B – OPT Headlamp Washer Motor

Rear Underseat Fuse Block (Driver’s Side)

The driver’s side rear fuse block is located under the rear seat on the driver’s side of the vehicle. The rear seat cushion must be removed to access the rear fuse block.

Cadillac CTS mk1 - fuse box - rear udnerseat (driver's side)
Cadillac CTS mk1 – fuse box – rear udnerseat (driver’s side)
Fuses Usage
SPARE Not Used
SPARE Not Used
AUDIO Radio, OnStar Module
SPARE Not Used
REAR DR MOD Rear Door Modules
SPARE Not Used
DRIVER DR MOD Driver’s Door Module
BAS Taillamps, Center High-Mounted Stoplamp, Flasher Module, ABS Module, Trailer Lamps
HDLP LEVELING Headlamp Leveling System Chassis Sensors (Export Only)
SPARE Not Used
CCP CCP (Climate Control Panel)
IGN 3 Heated Seat Modules, Air Inlet Motor, Shifter Assembly
SPARE Not Used
SPARE Not Used
FUSE PULLER Fuse Puller
L FRT HTD SEAT MOD Driver’s Heated Seat Module
MEM/ADAPT SEAT Driver’s Power Seat Switch, Memory Seat Module
TRUNK DR RELEASE Trunk Release Motor
REVERSE LAMP ISRVM (Inside Rearview Mirror), License Plate Lamp Assembly
SPARE Not Used
POSITION LAMP Taillamp Assemblies, Front Position Lamp Assemblies

 

Relay Usage
BAS RELAY MINI Brake Apply Sensor
PUSHER FAN Pusher Fan (Export Only)
L POSITION RELAY MICRO Driver’s Side Position Lamp
TRK DR REL SOL RELAY MICRO Trunk Release Motor
REV LAMP RELAY MICRO ISRVM (Inside Rearview Mirror), License Plate Lamp Assembly
R POSITION RELAY MICRO Passenger’s Side Position Lamp
IGN 3 RELAY MICRO Heated Seat Modules, Air Inlet Motor, Shifter Assembly
STANDING LAMP RLY MICRO Control for Position Lamp Relays

 

J Cases Usage
AMP Audio Amplifier
PUSHER FAN Pusher Fan (Export Only)

 

Circuit Breakers Usage
SEAT C/B Power Seat Switches, Memory Seat Module

Misc. Usage
JOINT
CONNECTOR
Joint Connector

Rear Underseat Fuse Block (Passenger’s Side)

The passenger’s side rear fuse block is located under the rear seat on the passenger’s side of the vehicle. The rear seat cushion must be removed to access the rear fuse block.

Cadillac CTS mk1 - fuse box - rear udnerseat (passenger's side)
Cadillac CTS mk1 – fuse box – rear udnerseat (passenger’s side)
Fuses Usage
TRUNK DIODE Trunk Lamp
POWER SOUNDER Power Sounder, Inclination Sensor
SPARE Not Used
CANISTER VENT Canister Vent Solenoid
FUEL PUMP MTR Fuel Pump Motor
SPARE Not Used
R FRT HTD SEAT MOD Passenger’s Side Heated Seat Module
SPARE Not Used
AIR BAG SDM (Sensing Diagnostic Module)
RIM ISRVM (Inside Rearview Mirror), Power Sounder, RIM
ABS Anti-Lock Brake System
SPARE Not Used
SPARE Not Used
SPARE Not Used
FUSE PULLER Fuse Puller
INTERIOR LAMP Hush Panel Lamps, Puddle Lamps, Overhead Courtesy Lamp Assembly
PSGR DR MOD Right Front Passenger Door Module
RIM/IGN SW RIM (Rear Integration Module), Ignition Switch, Key Lock Cylinder
REAR FOG LAMP Rear Fog Lamps (Export Only)
SPARE Not Used
TV/VICS TV Tuner Assembly (Export Only), VICS (Vehicle Information Communication System) Module

 

Relays Usage
SPARE Not Used
REAR DEFOG RELAY MINI Rear Window Defogger
SPARE Not Used
REAR FOG LAMP RLY MICRO Rear Fog Lamps (Export Only)
FUEL PUMP MOTOR RLY MICRO Fuel Pump Motor
INT LAMP RELAY MICRO Hush Panel Lamps, Puddle Lamps, Overhead Courtesy Lamp Assembly
IGN 1 RELAY MICRO Ignition Switch

 

 

Circuit Breakers Usage
DR MOD PWR C/B Door Modules

 

J Cases Usage
REAR DEFOG Rear Window Defogger Element
SUNROOF MOD Power Sunroof Module

 

Misc. Usage
JOINT CONNECTOR Joint Connector

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

Cadillac CTS (2004) – fuse box diagram

Cadillac CTS (2004) – fuse box diagram

Year of production: 2004

Underhood Fuse Block

The underhood fuse block is located in the engine compartment on the passenger’s side of the vehicle.

Cadillac CTS mk1 - fuse box - engine compartment
Cadillac CTS mk1 – fuse box – engine compartment
Relays Usage
LO SPEED FAN RELAY MINI Low Speed Fan Motor
HI SPEED FAN RELAY MINI High Speed Fan Motor
ACCESSORY RELAY MINI Accessory Power Outlets
S/P FAN RELAY MINI Series/Parallel Fan
PARK LAMP RELAY MICRO Parking Lamps
HORN RELAY MICRO Horn
HI BEAM RELAY MICRO High-Beam Headlamps
DRL RELAY MICRO – OPT Daytime Running Lamps
LO BEAM RELAY/HID MINI – OPT Low-Beam HID Headlamps (Option)
HDLP WASH RELAY MINI – OPT Headlamp Washer Motor (Option)
SPARE Not used
BLOWER RELAY MINI Front Blower
FOG LAMP RELAY MICRO Fog Lamps
MAIN RELAY MICRO Powertrain/ECM
STARTER RELAY MINI Starter Solenoid
CMP CLU RELAY MICRO Compressor Clutch
IGN-1 RELAY MICRO Ignition Switch (ON)

 

Wiring Harnesses Usage
BODY W/H Wiring Harness Connection
I/P W/H Wiring Harness Connection
ENG W/H Engine Wiring Harness Connection
FORWARD LAMP Forward Lamp Wiring Harness Connection

 

J Cases Usage
R REAR RRPDB (Passenger’s Side Rear Power Distribution Box)
R REAR RRPDB (Passenger’s Side Rear Power Distribution Box)
L REAR LRPDB (Driver’s Side Rear Power Distribution Box)
L REAR LRPDB (Driver’s Side Rear Power Distribution Box)
HI FAN High Cooling Fan Motor
LO FAN Low Cooling Fan Motor
BLOWER PWM Fan Motor Assembly
STARTER Starter Solenoid
ABS Anti-Lock Brake System

 

Fuses Usage
RT PARK Passenger’s Side Taillamp Assembly, Front Sidemarker and Front Parking Lamp Assembly
HORN Dual Horn Assembly
LT HI BEAM Driver’s Side High-Beam Headlamp
LT LOW BEAM Driver’s Side Low-Beam Headlamp
RT LOW BEAM Passenger’s Side Low-Beam Headlamp
RT HI BEAM Passenger’s Side High-Beam Headlamp
SPARE Not Used
SPARE Not Used
THEFT ECM (Electronic Control Module), TCM (Transmission Control Module), PASS-Key III+ Module
LT PARK Driver’s Side Taillamp Assembly, Front Sidemarker and Front Parking Lamp Assembly
DIMMING Rear License Plate Assembly, Dash Integrated Module (DIM)
DIM/ALDL DIM, ALDL (Assembly Line Data Link)
FLASHER Turn Signal/Hazard Flasher Module
ECM Electronic Control Module
STRG CTLS Steering Wheel Control Pad, Headlamp Switch
HTR VLV/CLTCH Heater Valve, Clutch Switch (Normal Closed), Clutch Switch (Normal Open), Jumper to Start Relay Coil for Automatic Transmission
WASH NOZ Driver’s and Passenger’s Side Heated Washer Nozzles
PRE O2/CAM Driver’s & Passenger’s Side Oxygen Sensors, Transmission Output Speed Sensor, CAM Phaser
TCM/IPC TCM, ECM and IPC (Instrument Panel Cluster)
SPARE Not Used
IGN MOD/MAF Front Bank Ignition Modules
ELEC PRNDL Electronic PRNDL
SPARE Not Used
SPARE Not Used
IGN SW Ignition Switch (Power to IGN-3 and CRANK)
VOLT CHECK DIM (Dash Integration Module)
ECM/TCM TCM (Transmission Control Module), ECM (Electronic Control Module), IPC (Instrument Panel Cluster), PASS-Key III+ Module
WPR MOD Windshield Wiper Module Assembly
ODD INJ/COILS Odd Ignition Coils, Fuel Injectors, Odd Injection Coils
COMP
CLUTCH
Compressor Clutch
WPR SW Windshield Wiper/Washer Switch
FOG LAMP Fog Lamps
OUTLET Center Console Accessory Power Outlet
POST 02 Driver’s and Passenger’s Side Oxygen Sensors, LRPDB (Pusher Cooling Fan Relay)
I/P OUTLET Instrument Panel Accessory Power Outlet
CCP Climate Control Panel
EVEN INJ/COILS Even Injection Coils
SPARE Not Used
SPARE Not Used
SPARE Not Used

 

Circuit Breakers Usage
HDLP WASH C/B – OPT Headlamp Washer Motor

Rear Underseat Fuse Block (Driver’s Side)

The driver’s side rear fuse block is located under the rear seat on the driver’s side of the vehicle. The rear seat cushion must be removed to access the rear fuse block.

Cadillac CTS mk1 - fuse box - rear udnerseat (driver's side)
Cadillac CTS mk1 – fuse box – rear udnerseat (driver’s side)
Relay Usage
BAS RELAY MINI Brake Apply Sensor
SPARE Not Used
SPARE Not Used
PUSHER FAN Pusher Fan (Export Only)
L POSITION RELAY MICRO Driver’s Side Position Lamp
R POSITION RELAY MICRO Passenger’s Side Position Lamp
IGN 3 RELAY MICRO Heated Seat Modules, Air Inlet Motor, Shifter Assembly
STANDING LAMP RLY MICRO Control for Position Lamp Relays
TRK DR REL SOL RELAY MICRO Trunk Release Motor
REV LAMP RELAY MICRO ISRVM (Inside Rearview Mirror), License Plate Lamp Assembly

 

Fuses Usage
L FRT HTD SEAT MOD Driver’s Heated Seat Module
MEM/ADAPT SEAT Driver’s Power Seat Switch, Memory Seat Module
TRUNK DR RELEASE Trunk Release Motor
REVERSE LAMP ISRVM (Inside Rearview Mirror), License Plate Lamp Assembly
SPARE Not Used
POSITION LAMP Taillamp Assemblies, Front Position Lamp Assemblies
SPARE Not Used
SPARE Not Used
AUDIO Radio, OnStar Module
SPARE Not Used
REAR DR MOD Rear Door Modules
SPARE Not Used
DRIVER DR MOD Driver’s Door Module
BAS Taillamps, Center High-Mounted Stoplamp, Flasher Module, ABS Module, Trailer Lamps
HDLP LEVELING Headlamp Leveling System Chassis Sensors (Export Only)
SPARE Not Used
CCP CCP (Climate Control Panel)
IGN 3 Heated Seat Modules, Air Inlet Motor, Shifter Assembly

 

J Cases Usage
AMP Audio Amplifier
PUSHER FAN Pusher Fan (Export Only)

 

Circuit Breakers Usage
SEAT C/B Power Seat Switches, Memory Seat Module

Rear Underseat Fuse Block (Passenger’s Side)

The passenger’s side rear fuse block is located under the rear seat on the passenger’s side of the vehicle. The rear seat cushion must be removed to access the rear fuse block.

Cadillac CTS mk1 - fuse box - rear udnerseat (passenger's side)
Cadillac CTS mk1 – fuse box – rear udnerseat (passenger’s side)
Relays Usage
RAP RELAY MINI Retained Accessory Power
SPARE Not Used
REAR DEFOG RELAY MINI Rear Window Defogger
SPARE Not Used
AFTER BOIL MICRO Afterboil Heater Pump
INT LAMP RELAY MICRO Hush Panel Lamps, Puddle Lamps, Overhead Courtesy Lamp Assembly
IGN 1 RELAY MICRO Ignition Switch
REAR FOG LAMP RLY MICRO Rear Fog Lamps (Export Only)
FUEL PUMP MOTOR RLY MICRO Fuel Pump Motor

 

Fuses Usage
INTERIOR LAMP Hush Panel Lamps, Puddle Lamps, Overhead Courtesy Lamp Assembly
PSGR DR MOD Right Front Passenger Door Module
RIM/IGN SW RIM (Rear Integration Module), Ignition Switch, Key Lock Cylinder
REAR FOG LAMP Rear Fog Lamps (Export Only)
SPARE Not Used
TV/VICS TV Tuner Assembly (Export Only), VICS (Vehicle Information Communication System) Module
SPARE Not Used
TRUNK DIODE Trunk Lamp
POWER SOUNDER Power Sounder, Inclination Sensor
SPARE Not Used
CANISTER VENT Canister Vent Solenoid
FUEL PUMP MTR Fuel Pump Motor
AFTERBOIL Afterboil Heater Pump
R FRT HTD SEAT MOD Passenger’s Side Heated Seat Module
SPARE Not Used
AIR BAG SDM (Sensing Diagnostic Module)
RIM ISRVM (Inside Rearview Mirror), Power Sounder, RIM, Passive Trunk Release Sensor
ABS Anti-Lock Brake System
SPARE Not Used

 

Circuit Breakers Usage
DR MOD PWR C/B Door Modules

 

J Cases Usage
REAR DEFOG Rear Window Defogger Element
SUNROOF MOD Power Sunroof Module

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

Cadillac CTS (2003) – fuse box diagram

Cadillac CTS (2003) – fuse box diagram

Year of production: 2003

Underhood Fuse Block

The underhood fuse block is located in the engine compartment on the passenger’s side of the vehicle.

Cadillac CTS mk1 - fuse box - engine compartment
Cadillac CTS mk1 – fuse box – engine compartment
Relays Usage
LO SPEED FAN RELAY MINI Low Speed Fan Motor
HI SPEED FAN RELAY MINI High Speed Fan Motor
ACCESSORY RELAY MINI Accessory Power Outlets
S/P FAN RELAY MINI Series/Parallel Fan
PARK LAMP RELAY MICRO Parking Lamps
HORN RELAY MICRO Horn
HI BEAM RELAY MICRO High-Beam Headlamps
DRL RELAY MICRO – OPT Daytime Running Lamps
LO BEAM RELAY/HID MINI – OPT Low-Beam HID Headlamps (Option)
HDLP WASH RELAY MINI – OPT Headlamp Washer Motor (Option)
CIGAR RELAY MINI Cigarette Lighter (Option)
BLOWER RELAY MINI Front Blower
FOG LAMP RELAY MICRO Fog Lamps
MAIN RELAY MICRO Powertrain/ECM
STARTER RELAY MINI Starter Solenoid
CMP CLU RELAY MICRO Compressor Clutch
IGN-1 RELAY MICRO Ignition Switch (ON)

 

Wiring Harnesses Usage
BODY W/H Wiring Harness Connection
BODY W/H Wiring Harness Connection
ENG W/H Engine Wiring Harness Connection

 

J Cases Usage
R REAR RRPDB (Passenger’s Side Rear Power Distribution Box)
R REAR RRPDB (Passenger’s Side Rear Power Distribution Box)
L REAR LRPDB (Driver’s Side Rear Power Distribution Box)
L REAR LRPDB (Driver’s Side Rear Power Distribution Box)
HI FAN High Cooling Fan Motor
LO FAN Low Cooling Fan Motor
BLOWER PWM Fan Motor Assembly
STARTER Starter Solenoid
EBCM Electronic Brake Control Module

 

Mini Fuses Usage
RT PARK Passenger’s Side Taillamp Assembly, Front Sidemarker and Front Parking Lamp Assembly
HORN Dual Horn Assembly
LT HI BEAM Driver’s Side High-Beam Headlamp
LT LOW BEAM Driver’s Side Low-Beam Headlamp
RT LOW BEAM Passenger’s Side Low-Beam Headlamp
RT HI BEAM Passenger’s Side High-Beam Headlamp
SPARE Not Used
SPARE Not Used
THEFT ECM (Electronic Control Module), TCM (Transmission Control Module), PASS-Key III+ Module
LT PARK Driver’s Side Taillamp Assembly, Front Sidemarker and Front Parking Lamp Assembly
LIC/DIMMING Rear License Plate Assembly, DIM
DIM/ALDL DIM, ALDL (Assembly Line Data Link)
FLASHER Turn Signal/Hazard Flasher Module
MANIFOLD Manifold Flaps 1 and 2, Air Mass Meter, Canister Purge Valve
STRG CTLS Steering Wheel Control Pad, Headlamp Switch
HTR VLV/CLTCH Heater Valve, Clutch Switch (Normal Closed), Clutch Switch (Normal Open), Jumper to Start Relay Coil for Automatic Transmission
WASH NOZ Driver’s and Passenger’s Side Heated Washer Nozzles
ECM Electronic Control Module
TCM/IPC TCM, ECM and IPC (Instrument Panel Cluster)
SPARE Not Used
IGN MOD Front Bank Ignition Modules
ELEC PRNDL Electronic PRNDL
TCC/ET TCC/ET Brake Switch (Extended Travel), TCC/ET Brake Switch (Cruise Disable)
STOP LP SW Stop Lamp Switch
IGN SW Ignition Switch (Power to IGN-3 and CRANK)
VOLT CHECK DIM (Dash Integration Module)
ECM/TCM TCM (Transmission Control Module), ECM (Electronic Control Module), IPC (Instrument Panel Cluster), PASS-Key III+ Module
WPR MOD Windshield Wiper Module Assembly
INJ Fuel Injectors
COMP
CLUTCH
Compressor Clutch
WPR SW Windshield Wiper/Washer Switch
FOG LAMP Fog Lamps
OUTLET Center Console Accessory Power Outlet
POST 02 Driver’s and Passenger’s Side Oxygen Sensors, LRPDB (Pusher Cooling Fan Relay)
I/P OUTLET Instrument Panel Accessory Power Outlet
CCP Climate Control Panel
PRE 02 Driver’s and Passenger’s Side Oxygen Sensors, Transmission Output Speed Sensor
SPARE Not Used
SPARE Not Used
SPARE Not Used

 

Circuit Breakers Usage
HDLP WASH C/B – OPT Headlamp Washer Motor (Option)

 

Rear Underseat Fuse Block (Driver’s Side)

The driver’s side rear fuse block is located under the rear seat on the driver’s side of the vehicle. The rear seat cushion must be removed to access the rear fuse block.

Cadillac CTS mk1 - fuse box - rear udnerseat (driver's side)
Cadillac CTS mk1 – fuse box – rear udnerseat (driver’s side)
Relay Usage
SPARE Not Used
SPARE Not Used
SPARE Not Used
PUSHER FAN Pusher Fan (Export Only)
L POSITION RELAY MICRO Driver’s Side Position Lamp
R POSITION RELAY MICRO Passenger’s Side Position Lamp
IGN 3 RELAY MICRO Heated Seat Modules, Air Inlet Motor, Shifter Assembly
STANDING LAMP RLY MICRO Control for Position Lamp Relays
TRK DR REL SOL RELAY MICRO Trunk Release Motor
REV LAMP RELAY MICRO ISRVM (Inside Rearview Mirror), License Plate Lamp Assembly

 

Minifuses Usage
L FRT HTD SEAT MOD Driver’s Heated Seat Module
MEM/ADAPT SEAT Driver’s Power Seat Switch, Memory Seat Module
TRUNK DR RELEASE Trunk Release Motor
REVERSE LAMP ISRVM (Inside Rearview Mirror), License Plate Lamp Assembly
SPARE Not Used
POSITION LAMP Taillamp Assemblies, Front Position Lamp Assemblies
SPARE Not Used
SPARE Not Used
AUDIO Radio, OnStar Module
SPARE Not Used
REAR DR MOD Rear Door Modules
SPARE Not Used
DRIVER DR MOD Driver’s Door Module
SPARE Not Used
HDLP LEVELING Headlamp Leveling System Chassis Sensors (Export Only)
EBCM EBCM (Electronic Brake Control Module)
CCP CCP (Climate Control Panel)
IGN 3 Heated Seat Modules, Air Inlet Motor, Shifter Assembly

 

J Cases Usage
AMP Audio Amplifier
PUSHER FAN Pusher Fan (Export Only)

 

Circuit Breakers Usage
SEAT C/B Power Seat Switches, Memory Seat Module

 

Rear Underseat Fuse Block (Passenger’s Side)

The passenger’s side rear fuse block is located under the rear seat on the passenger’s side of the vehicle. The rear seat cushion must be removed to access the rear fuse block.

Cadillac CTS mk1 - fuse box - rear udnerseat (passenger's side)
Cadillac CTS mk1 – fuse box – rear udnerseat (passenger’s side)
Minifuses Usage
INTERIOR LAMP Hush Panel Lamps, Puddle Lamps, Overhead Courtesy Lamp Assembly
PSGR DR MOD Right Front Passenger Door Module
RIM RIM (Rear Integration Module), Ignition Switch, Key Lock Cylinder
REAR FOG LAMP Rear Fog Lamps (Export Only)
SPARE Not Used
NAV TV Tuner Assembly (Export Only), VICS (Vehicle Information Communication System) Module
SPARE Not Used
SPARE Not Used
POWER SOUNDER Power Sounder, Inclination Sensor
SPARE Not Used
TRUNK LAMP Trunk Lamp
FUEL PUMP MTR Fuel Pump Motor
AFTERBOIL Afterboil Heater Pump
R FRT HTD SEAT MOD Passenger’s Side Heated Seat Module
SPARE Not Used
SIR SDM (Sensing Diagnostic Module)
RIM ISRVM (Inside Rearview Mirror), Power Sounder, RIM, Passive Trunk Release Sensor
CANISTER VENT Canister Vent Solenoid
SPARE Not Used

 

Circuit Breakers Usage
DR MOD PWR C/B Door Modules

 

J Cases Usage
REAR DEFOG Rear Window Defogger Element
SUNROOF MOD Power Sunroof Module

 

Relays Usage
RAP RELAY MINI Retained Accessory Power
SPARE Not Used
REAR DEFOG RELAY MINI Rear Window Defogger
SPARE Not Used
AFTER BOIL MICRO Afterboil Heater Pump
INT LAMP RELAY MICRO Hush Panel Lamps, Puddle Lamps, Overhead Courtesy Lamp Assembly
IGN 1 RELAY MICRO Ignition Switch
REAR FOG LAMP RLY MICRO Rear Fog Lamps (Export Only)
FUEL PUMP MOTOR RLY MICRO Fuel Pump Motor

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

Cadillac CT6 (2016 – 2018) – fuse box diagram

Cadillac CT6 (2016 – 2018) – fuse box diagram

Year of production: 2016, 2017, 2018

Engine compartment fuse block

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

Cadillac CT6 - fuse box - engine compartment
Cadillac CT6 Sedan – fuse box – engine compartment
Description
1 2016-2017: Traction power inverter 2
2018: Not Used
2 Power coolant pump
3 Not Used
4 Traction power inverter 1
5 Transmission/Ignition
6 Not Used
7 2016-2017: Starter 2
2018: Starter motor
8 2016-2017: Starter 1
2018: Starter pinion
9 Horn
10 Not Used
11 2016-2017: Right LED
2018: Not Used
12 2016-2017: Left LED
2018: Not Used
13 Left and right high-beam headlamps
14 Air conditioning control relay
15 2016-2017: Starter 2 relay
2018: Starter motor relay
16 2016-2017: Starter 1 relay
2018: Starter pinion relay
17 Run/Crank relay
18 Right cornering LED
19 2016-2017: Headlamp low-beam relay
2018: Not Used
20 High-beam headlamp relay
21 Air conditioning clutch
22 Not Used
23 Coolant heater control module
24 Coolant pump
25 Coolant pump relay
26 HI fuel
27 Steering column lock
28 Rear heated seats
29 Front heated seats
30 Not Used
31 2016-2017: LED LGT BAT
2018: HDLP/DRL/ Right headlamp
32 Air conditioning control module
33 2016-2017: AIR solenoid
2018: Not Used
34 Not Used
35 2016-2017: Engine control module
2018: Engine control module IGN2
36 2016-2017: Engine control module 2
2018: Engine control module IGN1
37 Coolant pump
Ignition coils–odd
38 Ignition coils–even
Non walk 2
39 Non walk
40 Instrument cluster
41 Not Used
42 Fuel pump power module
43 Instrument panel body/Ignition
44 Aeroshutter
45 Washer
46 Front sensor
47 Left cornering LED
48 2016-2017: AIR solenoid relay
2018: Not Used
49 2016-2017: Air pump relay
2018: Not Used
50 Engine control module relay
51 Wiper speed relay
52 Wiper control relay
53 Headlamp control relay
54 Not Used
55 Not Used
56 2016-2017: Air pump
2018: Not Used
57 Not Used
58 2016-2017: Instrument panel electronic center
2018: Not Used
59 Not Used
60 ABS pump
61 Front wiper
62 Headlamp leveling
63 Electric brake booster module
64 Not Used
65 Not Used
66 Transfer case control module
67 Electric brake booster
68 Rear seat entertainment display
69 2016: Not Used
2017-2018: Rechargeable energy storage system coolant pump
70 Not Used
71 ABS valve
72 Not Used
73 Not Used

Instrument panel fuse block

The instrument panel fuse block is behind the driver side instrument panel storage compartment.

Cadillac CT6 - fuse box - instrument panel
Cadillac CT6 Sedan – fuse box – instrument panel
Description
1 2016-2017: Traction power inverter 2
2018: Not Used
2 Power coolant pump
3 Not Used
4 Traction power inverter 1
5 Transmission/Ignition
6 Not Used
7 2016-2017: Starter 2
2018: Starter motor
8 2016-2017: Starter 1
2018: Starter pinion
9 Horn
10 Not Used
11 2016-2017: Right LED
2018: Not Used
12 2016-2017: Left LED
2018: Not Used
13 Left and right high-beam headlamps
14 Air conditioning control relay
15 2016-2017: Starter 2 relay
2018: Starter motor relay
16 2016-2017: Starter 1 relay
2018: Starter pinion relay
17 Run/Crank relay
18 Right cornering LED
19 2016-2017: Headlamp low-beam relay
2018: Not Used
20 High-beam headlamp relay
21 Air conditioning clutch
22 Not Used
23 Coolant heater control module
24 Coolant pump
25 Coolant pump relay
26 HI fuel
27 Steering column lock
28 Rear heated seats
29 Front heated seats
30 Not Used
31 2016-2017: LED LGT BAT
2018: HDLP/DRL/ Right headlamp
32 Air conditioning control module
33 2016-2017: AIR solenoid
2018: Not Used
34 Not Used
35 2016-2017: Engine control module
2018: Engine control module IGN2
36 2016-2017: Engine control module 2
2018: Engine control module IGN1
37 Coolant pump
Ignition coils–odd
38 Ignition coils–even
Non walk 2
39 Non walk
40 Instrument cluster
41 Not Used
42 Fuel pump power module
43 Instrument panel body/Ignition
44 Aeroshutter
45 Washer
46 Front sensor
47 Left cornering LED
48 2016-2017: AIR solenoid relay
2018: Not Used
49 2016-2017: Air pump relay
2018: Not Used
50 Engine control module relay
51 Wiper speed relay
52 Wiper control relay
53 Headlamp control relay
54 Not Used
55 Not Used
56 2016-2017: Air pump
2018: Not Used
57 Not Used
58 2016-2017: Instrument panel electronic center
2018: Not Used
59 Not Used
60 ABS pump
61 Front wiper
62 Headlamp leveling
63 Electric brake booster module
64 Not Used
65 Not Used
66 Transfer case control module
67 Electric brake booster
68 Rear seat entertainment display
69 2016: Not Used
2017-2018: Rechargeable energy storage system coolant pump
70 Not Used
71 ABS valve
72 Not Used
73 Not Used

Rear (luggage) compartment fuse block

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

Luggage Compartment – Without Super Cruise (2016-2018)
Cadillac CT6 - fuse box - rear compartment
Cadillac CT6 Sedan – fuse box – rear compartment
Description
F01 UCAP
F02 Trunk power outlet
F03 Driver window motor
F04 Not Used
F05 Canister vent
F06 Right rear memory seat
F07 Body control module 7
F08 Driver seat adjustment switch
F09 Passive entry
Passive start
F10 Rear subwoofer amplifier
F11 Driver memory seat module
F12 Not Used
F13 Not Used
F14 Rear seat memory/ heated
F15 Left front amplifier
F16 Right front seat
F17 Rear heated seat
F18 Regulated voltage
control battery
F19 2016-2017: Door mirror switch
2018: Driver, passenger door window/mirror/ driver seat adjustment
F20 Not Used
F21 Vehicle integration control module
F22 Not Used
F23 Rear closure
F24 Not Used
F25 Left motorized safety belt pretensioner
F26 Rear defogger
F27 Right front amplifier
F28 Amplifier
F29 Sunroof
F30 Body control module 2
F31 Body control module 6
F32 Exterior heated mirror
F33 2016-2017: Right window
2018: Right mirror
F34 Power trunk module
F35 On-board charging module
F36 Alarm siren module
F37 DC AC inverter
F38 Rear blower
F39 Fuel pump power
F40 Not Used
F41 Rear seat power outlet
F42 Left rear memory seat
F43 Not Used
F44 Rear closure release switch/lift gate module
F45 Auxiliary audio/Video/Radio
F46 External object calculating
Side blind zone alert
Radar short range sensor
Long range radar sensors (2018)
F47 Not Used
F48 Right front seat
F49 Memory bolster module
F50 Body control module 1
F51 Transmission control module
F52 Parking assist
F53 Heated, cooled or ventilated seats (if equipped)
F54 2016:
Rain sensor
Power sounder
Intrusion
Universal remote system
2017-2018: Headliner
F55 Front memory seat module
F56 Evaporative emissions leak check module
F57 Voltage current temperature module
F58 Not Used
F59 Engine control module power
F60 Right motorized safety belt pretensioner
F61 Parking lamps
F62 Not Used
F63 Not Used
F64 Engine control module Ignition
F65 Rear glass sunshade
F66 Rear vision camera/Interior rearview mirror
F67 2016:
DC DC converter
Air quality sensor
2017: Run/Crank/MISC
2018: Run/crank misc/DC DC converter/air quality sensor
F68 Damping control module
F69 2016: Not Used
2017-2018: Television tuner module
F70 Not Used
F71 Not Used
F72 Not Used
F73 Not Used
F74 Not Used
F75 Not Used
Relays
R1 Rear seat power outlet relay
R2 Fuel pump relay
R3 Run/Crank relay

 

Relays Usage
R1 Rear seat power outlet relay
R2 Fuel pump relay
R3 Run/Crank relay

 

Luggage Compartment – With Super Cruise (2018)
Cadillac CT6 - fuse box diagram - luggage compartment with super cruise (2018)
Cadillac CT6 – fuse box diagram – luggage compartment with super cruise (2018)
Usage
F01 Not Used
F02 Body control module 2 and 4
F03 Left rear external object calculating module
F04 Steering wheel display touch sensor
F05 Not Used
F06 Not Used
F07 Left front and right rear short range radar sensor/Camera image processing module
F08 Driver memory seat module
F09 Column friction device
F10 Left headlamp
F11 Not Used
F12 Not Used
F13 Left front subwoofer
F14 Rear blower
F15 Left window
F16 Canister vent
F17 Rear heated seat
F18 Rear subwoofer
F19 Damping control module
F22 Not Used
F23 Left front motorized seat belt pretensioner
F24 Body control module 7
F25 Passive entry/Passive start
F26 Rear closure latch
F27 Amplifier
F28 Rear defogger
F29 Ultrasonic park assist module
F30 Body control module 1
F31 Driver monitoring system
F32 Driver mirror switch
F33 Seat adjustment switch
F34 Left front memory seat
F35 Right rear memory seat
F36 Heated mirror
F37 Not Used
F38 Transmission control module
F39 Not Used
F40 Not Used
F41 Not Used
F42 Not Used
F43 Power trunk module
F44 Right front memory seat
F45 Not Used
F46 Right window
F47 Engine control module battery
F48 Right front subwoofer
F49 Body control module 6
F50 Regulated voltage control battery
F51 DC AC inverter
F52 Fuel pump power module
F53 Rear seat auxiliary power outlet
F54 Left rear memory seat
F55 Not Used
F56 Rear closure release switch/Liftgate module
F57 Rear left and rear center short range and long range radar sensor/Rt rear EOCM
F58 Radio
F59 Not Used
F60 Memory bolster module
F61 Not Used
F62 Ventilated seat
F63 Headliner
F64 Passenger memory seat module
F65 Right front short range radar sensor/ Advance driver assist map
F66 Television tuner module
F67 Not Used
F68 Not Used
F69 Not Used
F70 Right front motorized seat belt pretensioner
F71 Rear heated seat module
F72 Sunroof
F73 Rear vision camera/ Inside rear view mirror/Air quality sensor
F74 Rear window sunshade
F75 Engine control module ignition
F76 Misc run crank/ Energy storage control module/ Camera
F77 Trunk auxiliary power outlet
F78 Rear HVAC display
F79 Not Used
F80 Not Used
F81 Not Used
F82 Not Used
F83 Not Used
F84 Not Used
F85 Not Used
F86 Not Used
F87 Not Used
Relays
R1 Rear seat auxiliary power outlet
R2 Fuel pump
R3 Run/Crank

 

 

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