Cadillac DeVille mk8 (Eighth Generation; 2003 – 2005) – fuse box diagram

Cadillac DeVille mk8 (Eighth Generation; 2003 – 2005) – fuse box diagram

Year of production: 2003, 2004, 2005

Underhood Fuse Block

The underhood fuse block is located next to the engine on the passenger’s side of the vehicle. To access the fuses, push in the two tabs located at each end of the fuse block cover. Then lift the cover off.

Cadillac DeVille mk8 - fuse box - engine compartment
Cadillac DeVille mk8 – fuse box – engine compartment

Fuse 22 or 23 can be moved to the outer position to enable the accessory power outlets or cigarette lighter when the ignition is not on.

 

Fuses Usage
1 Assembly Line Diagnostic Work
2 Accessory
3 Windshield Wipers
4 Not Used
5 Headlamp Low Beam Left
6 Headlamp Low Beam Right
7 Instrument Panel
8 Powertrain Control Module Battery
9 Headlamp High Beam Right
10 Headlamp High Beam Left
11 Ignition 1
12 Fog Lamps
13 Transmission
14 Cruise Control
15 Coil Module
16 Injector Bank #2
17 Not Used
18 Not Used
19 Powertrain Control Module Ignition
20 Oxygen Sensor
21 Injector Bank #1
22 Cigar Lighter #2
23 Cigar Lighter #1
24 Daytime Running Lamps
25 Horn
26 Air Conditioner Clutch
42 Not Used
43 Not Used
44 Anti-Lock Brake System
45 Air Pump
46 Cooling Fan 1
47 Cooling Fan 2

 

Relays Usage
27 Headlamp High Beam
28 Headlamp Low Beam
29 Fog Lamps
30 Daytime Running Lamps
31 Horn
32 Air Conditioner Clutch
33 Not Used
34 Accessory
35 Not Used
36 Starter 1
37 Cooling Fan 1
38 Ignition 1
39 Cooling Fan Series/Parallel
40 Cooling Fan 2

 

Circuit Breakers Usage
41 Starter

The spare fuses are located in numbers 48 through 52. The fuse puller is located in number 53.

 

Rear Underseat Fuse Block

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

Cadillac DeVille mk8 - fuse box - rear underseat
Cadillac DeVille mk8 – fuse box – rear underseat
Fuses Usage
1 Fuel Pump
2 Heater, Ventilation and Air Conditioning Battery
3 Memory Seat, Tilt and Telescoping Steering
4 RR Lumbar, Antenna
5 Driver Door Module
6 Heated Seat Left Rear
7 Power Tilt and Telescoping Steering
8 Supplemental Inflation Restraint
9 SDAR (XM™ Satellite Radio)
10 Lamps Park Right
11 Fuel Tank Ventilation Solenoid
12 Ignition 1
13 Interior Lamp Dimmer Module
14 Sunshade
15 Navigation
16 Heated Seat Left Front
17 Interior Lamps
18 Right Rear Door Module
19 Stoplamps
20 Park/Reverse
21 Audio
22 Retained Accessory Power for Sunroof
23 Lamps, Parking Left
24 Night Vision
25 Passenger Door Module
26 Body
27 Export Lights, Power Locks
28 Rear HVAC Blower
29 Ignition Switch
30 Hazard Signal
31 Reverse, Locks
32 Continuous Variable Road Sensing Suspension
33 Heating, Ventilation, Air Conditioning
34 Ignition 3 Rear
35 Antilock Braking System
36 Heated Seat, Right Front
37 Heated Seat, Right Rear
38 Dimmer
60 Park Brake
61 Rear Defog
62 HVAC Blower
63 Audio Amplifier
64 ELC Compressor/Exhaust
65 Cigar Lighter
66 Not Used

 

Relays Usage
39 Fuel Pump
40 Parking Lamps
41 Ignition 1
42 Park Brake A
43 Park Brake B
44 Park Shift Interlock
45 Reverse Lamps
46 Retained Accessory Power for Sunroof
47 Reverse Lockout
48 Suspension Dampers
49 Ignition 3
50 Fuel Tank Door Release
51 Interior Lamps
52 Trunk Release
53 Not Used
54 Lock, Cylinder
55 Automatic Level Control Compressor
58 Cigar Lighter
59 Rear Defog

 

Circuit Breakers Usage
56 Power Seats
57 Power Windows

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