2005 CADILLAC DEVILLE Owners Manual

Electrical System
Add-On Electrical Equipment
Notice:Don’t add anything electrical to your
vehicle unless you check with your dealer rst.
Some electrical equipment can damage your vehicle
and the damage wouldn’t be covered by your
warranty. Some add-on electrical equipment can
keep other components from working as they
should.
Your vehicle has an airbag system. Before attempting to
add anything electrical to your vehicle, seeServicing
Your Airbag-Equipped Vehicle on page 1-58.
Headlamp Wiring
The headlamp wiring system has four individual fuses.
An electrical overload will cause the lamps to go on
and off, or in some cases to remain off. If this happens,
have the headlamp wiring checked right away.
Windshield Wiper Fuses
The windshield wiper motor is protected by an internal
circuit breaker. If the wiper motor overheats due to
heavy snow, the wipers will stop until the motor cools
and will then restart.
A fuse powers the wiper motor. If the fuse blows, there
is an electrical problem. Be sure to have it xed.
Power Windows and Other Power
Options
Circuit breakers protect the power windows and power
seats. When the current load is too heavy, the circuit
breaker opens and closes, protecting the circuit until the
problem is xed or goes away.
5-97

Fuses and Circuit Breakers
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 res
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 fuse should blow, see your dealer
for service immediately.
If you ever have a problem on the road and do not have
a spare fuse, you can “borrow” one that has the same
amperage. Pick some feature of your vehicle that
you can get along without — like the radio or cigarette
lighter — and use its fuse, if it is the correct amperage.
Replace it as soon as you can.
The fuses are located in two fuse blocks, one located in
the engine compartment, and the other under the
rear seat. If a fuse should blow, have your vehicle
serviced by your dealer immediately.
Underhood Fuse Block
The underhood fuse block
is located next to the
engine on the passenger’s
side of the vehicle.
For more information on
location, seeEngine
Compartment Overview on
page 5-12.
To access the fuses, push in the two tabs located at
each end of the fuse block cover. Then lift the cover off.
5-98

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
Fuses Usage
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
5-99

Fuses Usage
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 Usage
27 Headlamp High Beam
28 Headlamp Low Beam
29 Fog Lamps (Option)
30 Daytime Running Lamps
31 Horn
Relays Usage
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
BreakersUsage
41 Starter
Miscellaneous Usage
53 Fuse Puller
5-100

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.
Removing the Rear Seat Cushion
Notice:If you touch the exposed wires with the
metal on the seat cushion, you could cause a
short that could damage the battery and or wires.
Avoid contact between the rear seat and the
fuse center whenever you remove or reinstall the
rear seat. Do not remove covers from any of
the covered parts, and do not store anything
under the seats.
To remove the rear seat cushion, do the following:
1. Pull up on the front of the cushion to release the
front hooks.
2. Pull the cushion up and out toward the front of
the vehicle.To access the fuse block, push in the two tabs located
at each end of the fuse block cover. Then lift the
cover off.
5-101

To reinstall the rear seat cushion, do the following:
{CAUTION:
A safety belt that is not properly routed
through the seat cushion or is twisted will not
provide the protection needed in a crash.
CAUTION: (Continued)
CAUTION: (Continued)
If the safety belt has not been routed through
the seat cushion at all, it will not be there to
work for the next passenger. The person
sitting in that position could be badly injured.
After reinstalling the seat cushion, always
check to be sure that the safety belts are
properly routed and are not twisted.
1. Buckle the center passenger position safety belt,
then route the safety belts through the proper slots
in the seat cushion. Do not let the safety belts
get twisted.
2. 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.
3. With the seat cushion lowered, push rearward and
then press down on the seat cushion until the
spring locks on both ends engage.
4. Check to make sure the safety belts are properly
routed and that no portion of any safety belt is
trapped under the seat. Also make sure the seat
cushion is secured.
5-102

Fuses Usage
1 Fuel Pump
2Heater, Ventilation and Air
Conditioning Battery
3Memory 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 Ination Restraint
Fuses Usage
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
22Retained Accessory Power for
Sunroof
23 Lamps, Parking Left
24 Night Vision
25 Passenger Door Module
26 Body
27 Export Lights, Power Locks
5-103

Fuses Usage
28 Rear HVAC Blower
29 Ignition Switch
30 Turn Signal, Hazard Signal
31 Reverse, Locks
32Continuous 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 Not Used
61 Rear Defog
62 HVAC BlowerFuses Usage
63 Audio Amplier
64Automatic Level Control
Compressor, Exhaust
65 Not Used
66 Not Used
67 Not Used
68 Not Used
69 Not Used
70 Not Used
71 Not Used
72 Not Used
73 Not Used
74 Not Used
75 Not Used
5-104