In this article, you will find information about the fuses of the DeVille (models 2000, 2001, 2002, 2003, 2004, and 2005), including diagrams of the fuse boxes, a list of fuses and relays, their designation, and the location of the fuse blocks within the vehicle.
Checking and Replacing Fuses in Cadillac DeVille
The wiring circuits in your vehicle are protected from short circuits by a combination of fuses and circuit breakers. This greatly reduces the chance of fires caused by electrical problems. Look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure you replace a bad fuse with a new one of the identical size and rating. If a MaxiFuse should blow, have your vehicle serviced by your dealer immediately. The headlamp wiring system has four individual fuses, LF low, RF low, LF high and RF high.
Caution!
Be sure you replace a bad fuse with a new one of the identical size and rating.
If a MaxiFuse should blow, have your vehicle serviced by your dealer immediately.
Always keep the covers on any electrical component.
Location of Fuse Boxes
Underhood Junction Block: The front Bussed Electrical Center (BEC) is located next to the engine on the passenger’s side of the vehicle. To access the fuse block, push in the two tabs located on the top and the bottom of the fuse block cover.
Rear Underseat Bussed Electrical Center: The rear BEC is located under the rear seat on the driver’s side. The rear seat cushion must be removed to access the BEC.
Removing the Rear Seat Cushion:
The battery and main fuse boxes are located under the rear seat cushion. The battery’s ground terminal and some relay wires are exposed. To help avoid damage to the battery and wires, be careful when removing or reinstalling the seat cushion. Do not remove covers from covered parts. Do not store anything under the seat, as objects could touch exposed wires and cause a short.
Pull up on the front of the cushion to release the front hooks.
Pull the cushion up and out toward the front of the vehicle.
To Reinstall the Rear Seat Cushion:
Buckle the center passenger position safety belt, then route the safety belts through the proper slots in the seat cushion. Don’t let the safety belts get twisted.
Slide the rear of the cushion up and under the seatback so the rear-locating guides hook into the wire loops on the back frame.
With the seat cushion lowered, push rearward and then press down on the seat cushion until the spring locks on both ends engage.
Fuse Box Diagrams
2000
Underhood Junction Block
List of fuses in the Underhood Junction Block (2000)
№
Usage
Minifuses
1
Assembly Line Diagnostic Link
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
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
Micro Relays
27
Headlamp High Beam
28
Headlamp Low Beam
29
Fog Lamps
30
Daytime Running Lamps
31
Horn
32
Air Conditioner Clutch
Mini Relays
33
Not Used
34
Accessory
35
Not Used
36
Starter 1
37
Cooling Fan Secondary
38
Ignition 1
39
Cooling Fan Series / Parallel
40
Cooling Fan Primary
Maxibreaker
41
Starter
MaxiFuses
42
Not Used
43
Anti-Lock Brake System
44
Air Pump B
45
Air Pump A
46
Cooling Fan Secondary
47
Cooling Fan Primary
Rear Underseat Bussed Electrical Center
List of fuses in the Rear Underseat Bussed Electrical Center (2000)
№
Usage
Minifuses
1
Fuel Pump
2
Heater, Ventilation and Air Conditioning Battery
3
Memory Seat, Tilt and Telescoping Steering
4
HVAC Blower
5
Driver Door Module
6
Heated Seat Left Rear
7
Power Tilt and Telescoping Steering
8
Supplemental Inflation Restraint
9
Not Used
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
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
Micro Relays
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
CVRSS Dampers
49
Ignition 3
50
Fuel Tank Door Release
51
Interior Lamps
52
Trunk Release
53
Not Used
54
Lock, Cylinder
55
Electronic Level Control Compressor
Circuit Breakers
56
Power Seats
57
Power Windows
Mini Relays
58
Cigar Lighter
59
Right Rear Defog
MaxiFuses
60
Park Brake
61
Rear Defog
62
Right Rear Lumbar, Power
63
Audio Amplifier
64
ELC Compressor/Exhaust
65
Cigar Lighter
66
Not Used
2001
Underhood Junction Block
List of fuses in the Underhood Junction Block (2001)
№
Usage
Minifuses
1
Assembly Line Diagnostic Link
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
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
Micro Relays
27
Headlamp High Beam
28
Headlamp Low Beam
29
Fog Lamps
30
Daytime Running Lamps
31
Horn
32
Air Conditioner Clutch
Mini Relays
33
Not Used
34
Accessory
35
Not Used
36
Starter 1
37
Cooling Fan Secondary
38
Ignition 1
39
Cooling Fan Series/Parallel
40
Cooling Fan Primary
Maxibreaker
41
Starter
MaxiFuses
42
Not Used
43
Not Used
44
Anti-Lock Brake System
45
Air Pump
46
Cooling Fan Secondary
47
Cooling Fan Primary
Rear Underseat Bussed Electrical Center
List of fuses in the Rear Underseat Bussed Electrical Center (2001)
№
Usage
Minifuses
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
Not Used
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
Micro Relays
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
CVRSS Dampers
49
Ignition 3
50
Fuel Tank Door Release
51
Interior Lamps
52
Trunk Release
53
Not Used
54
Lock, Cylinder
55
Electronic Level Control Compressor
Circuit Breakers
56
Power Seats
57
Power Windows
Mini Relays
58
Cigar Lighter
59
Right Rear Defog
MaxiFuses
60
Park Brake
61
Rear Defog
62
HVAC Blower
63
Audio Amplifier
64
ELC Compressor / Exhaust
65
Cigar Lighter
66
Not Used
2002
Underhood Junction Block
List of fuses in the Underhood Junction Block (2002)
№
Usage
Minifuses
1
Assembly Line Diagnostic Link
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
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
Micro Relays
27
Headlamp High Beam
28
Headlamp Low Beam
29
Fog Lamps
30
Daytime Running Lamps
31
Horn
32
Air Conditioner Clutch
Mini Relays
33
Not Used
34
Accessory
35
Not Used
36
Starter 1
37
Cooling Fan Secondary
38
Ignition 1
39
Cooling Fan Series / Parallel
40
Cooling Fan Primary
Maxibreaker
41
Starter
MaxiFuses
42
Not Used
43
Not Used
44
Anti-Lock Brake System
45
Air Pump
46
Cooling Fan Secondary
47
Cooling Fan Primary
Rear Underseat Bussed Electrical Center
List of fuses in the Rear Underseat Bussed Electrical Center (2002)
№
Usage
Minifuses
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-If Equipped)
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
Micro Relays
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
Electronic Level Control Compressor
Circuit Breakers
56
Power Seats
57
Power Windows
Mini Relays
58
Cigar Lighter
59
Rear Defog
MaxiFuses
60
Park Brake
61
Rear Defog
62
HVAC Blower
63
Audio Amplifier
64
ELC Compressor / Exhaust
65
Cigar Lighter
66
Not Used
2003
Underhood Junction Block
List of fuses in the Underhood Junction Block (2003)
№
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
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
41
Starter
Rear Underseat Bussed Electrical Center
List of fuses in the Rear Underseat Bussed Electrical Center (2003)
№
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
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
56
Power Seats
57
Power Windows
2004
Underhood Junction Block
List of fuses in the Underhood Junction Block (2004)
№
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
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
41
Starter
Rear Underseat Bussed Electrical Center
List of fuses in the Rear Underseat Bussed Electrical Center (2004)
№
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
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
56
Power Seats
57
Power Windows
2005
Underhood Junction Block
List of fuses in the Underhood Junction Block (2005)
№
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 (Option)
13
Transmission
14
Cruise Control
15
Coil Module (Option)
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
48
Spare
49
Spare
50
Spare
51
Spare
52
Spare
54
Heated Steering Wheel (Option)
Relays
27
Headlamp High Beam
28
Headlamp Low Beam
29
Fog Lamps (Option)
30
Daytime Running Lamps
31
Horn
32
Air Conditioner Clutch
33
AIR Control Valve (Option)
34
Heated Steering Wheel (Option)
35
Accessory
36
Starter 1
37
Cooling Fan 1
38
Ignition 1
39
Cooling Fan Series / Parallel
40
Cooling Fan 2
Circuit Breakers
41
Starter
Miscellaneous
53
Fuse Puller
Rear Underseat Bussed Electrical Center
List of fuses in the Rear Underseat Bussed Electrical Center (2005)