2003 CADILLAC DEVILLE wiring

Lockout Protection
Leaving your key in any ignition position with any door
open will disable the power door lock switches as
well as the lock button on the remote keyless entry
transmitter. If you close the doors, you can lock them
using the remote keyless entry transmitter. It is
always recommended that you remove the ignition key
when locking your vehicle.
The anti-lockout feature can be overridden by holding
the power door lock switch for three seconds or longer.
Leaving Your Vehicle
If you are leaving your vehicle, open the door, set the
locks from the inside, get out and close the door.
Trunk
{CAUTION:
It can be dangerous to drive with the trunk lid
open because carbon monoxide (CO) gas can
come into your vehicle. You can't see or smell
CO. It can cause unconsciousness and even
death. If you must drive with the trunk lid open
or if electrical wiring or other cable
connections must pass through the seal
between the body and the trunk lid:
·Make sure all other windows are shut.
·Turn the fan on your heating or cooling
system to its highest speed and select the
control setting that will force outside air
into your vehicle. See ªClimate Control
Systemº in the Index.
·If you have air outlets on or under the
instrument panel, open them all the way.
See ªEngine Exhaustº in the Index.
2-11

Safety Belt Reminder Light
When the key is turned to ON or START, a chime will
come on for several seconds to remind people to fasten
their safety belts.
The safety belt light will
also come on and stay on
for several seconds. If
the driver's belt is already
buckled, the light will
come on brie¯y, but the
chime will not sound.
Air Bag Readiness Light
There is an air bag readiness light on the instrument
panel, which shows AIR BAG or the air bag symbol. The
system checks the air bag's electrical system for
malfunctions. The light tells you if there is an electrical
problem. The system check includes the air bag
sensors, the air bag modules, the wiring and the crash
sensing and diagnostic module. For more information
on the air bag system, see
Air Bag Systems on
page 1-49.
Thislight will come on when you start your vehicle, and it
will ¯ash for a few seconds. Then the light should go out.
This means the system is ready.
United StatesCanada (Analog Only)
3-45

Turn Signals When Towing a Trailer
When you tow a trailer, your vehicle may need a
different turn signal ¯asher and/or extra wiring. Check
with your dealer. The arrows on your instrument
panel will ¯ash whenever you signal a turn or lane
change. Properly hooked up, the trailer lamps will also
¯ash, telling other drivers you're about to turn,
change lanes or stop.
When towing a trailer, the arrows on your instrument
panel will ¯ash for turns even if the bulbs on the trailer
are burned out. Thus, you may think drivers behind
you are seeing your signal when they are not. It's
important to check occasionally to be sure the trailer
bulbs are still working.
Driving on Grades
Reduce speed and shift to a lower gearbeforeyou start
down a long or steep downgrade. If you don't shift
down, you might have to use your brakes so much that
they would get hot and no longer work well.
On long uphill grades, reduce speed to 45 to 50 mph
(70 to 90 km/h) and avoid prolonged use of SECOND (2)
gear and engine speeds above 3800 rpm.
Climbing grades steeper than four percent at
temperatures above 90É F (32É C) with a loaded vehicle
and trailer is not recommended. The cooling system
may temporarily overheat. See
Engine Overheating on
page 5-27.
Parking on Hills
{CAUTION:
You really should not park your vehicle, with a
trailer attached, on a hill. If something goes
wrong, your rig could start to move. People
can be injured, and both your vehicle and the
trailer can be damaged.
But if you ever have to park your rig on a hill, here's
how to do it:
1. Apply your regular brakes, but do not shift into
PARK (P).
2. Have someone place chocks behind the trailer
wheels.
3. When the wheel chocks are in place, release the
regular brakes until the chocks absorb the load.
4. Reapply the regular brakes. Then shift into PARK
(P) ®rmly and apply your parking brake.
5. Release the regular brakes.
4-39

Uniform Tire Quality Grading..........................5-67
Wheel Alignment and Tire Balance..................5-68
Wheel Replacement......................................5-69
Tire Chains..................................................5-70
If a Tire Goes Flat........................................5-71
Changing a Flat Tire.....................................5-72
Compact Spare Tire......................................5-83
Appearance Care............................................5-84
Cleaning the Inside of Your Vehicle.................5-84
Care of Safety Belts......................................5-87
Weatherstrips...............................................5-87
Cleaning the Outside of Your Vehicle..............5-88
Sheet Metal Damage.....................................5-90
Finish Damage.............................................5-90
Underbody Maintenance................................5-90Chemical Paint Spotting.................................5-90
Vehicle Care/Appearance Materials..................5-91
Vehicle Identi®cation......................................5-92
Vehicle Identi®cation Number (VIN).................5-92
Service Parts Identi®cation Label.....................5-93
Electrical System............................................5-93
Add-On Electrical Equipment..........................5-93
Headlamp Wiring..........................................5-93
Windshield Wiper Fuses................................5-93
Power Windows and Other Power Options.......5-93
Fuses and Circuit Breakers............................5-94
Removing the Rear Seat Cushion...................5-96
Capacities and Speci®cations........................5-101
Normal Maintenance Replacement Parts.........5-103
Section 5 Service and Appearance Care
5-2

Service Parts Identi®cation Label
You'll ®nd this label on the under side of the spare tire
cover in the trunk. It's very helpful if you ever need
to order parts. On this label is:
·your VIN,
·the model designation,
·paint information and
·a list of all production option and special equipment.
Be sure that this label is not removed from the
vehicle.
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 air bag system. Before attempting
to add anything electrical to your vehicle, see
Servicing Your Air Bag-Equipped Vehicle on page 1-59.
Headlamp Wiring
The headlamp wiring system has four individual fuses,
LF low, RF low, LF high and RF high. 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.
5-93

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 don't have
a spare fuse, you can ªborrowº 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 on the passenger's side and
the other under the rear seat on the driver's side.
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, see
Engine
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.
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. See your dealer for
additional assistance, if needed.
5-94

Driver Information Center (DIC).........................3-57
Climate Controls and Radio System
Personalization........................................3-67
DIC Controls and Displays............................3-57
DIC Vehicle Personalization..........................3-67
DIC Warnings and Messages........................3-60
Driver Unlock in PARK (P)................................3-74
Driver Unlock Key Off......................................3-74
Driver............................................................1-14
Position, Safety Belt.....................................1-14
Driver's Name Set/Recall.................................3-78
Driving on Grades...........................................4-39
Driving on Snow or Ice....................................4-26
Driving Through Deep Standing Water...............4-19
Driving Through Flowing Water.........................4-19
Driving with a Trailer.......................................4-38
Driving..........................................................4-16
At Night.....................................................4-16
City...........................................................4-20
Defensive..................................................... 4-2
Drunken....................................................... 4-2
Freeway.....................................................4-21
Hill and Mountain Roads..............................4-23
In Rain and on Wet Roads...........................4-17
Winter........................................................4-25
Dual Climate Control System............................3-29E
Electrical System............................................5-93
Add-On Equipment......................................5-93
Fuses and Circuit Breakers...........................5-94
Headlamp Wiring.........................................5-93
Power Windows and Other Power Options......5-93
Removing the Rear Seat Cushion..................5-96
Windshield Wiper Fuses...............................5-93
Emergency Trunk Release Handle.....................2-13
Emissions Inspection and Maintenance
Programs...................................................3-53
Engine Coolant Level Check.............................. 6-9
Engine Cooling When Trailer Towing..................4-40
Engine Oil Additives........................................5-17
Engine Oil Level Check..................................... 6-9
Engine Oil Scheduled Maintenance..................... 6-5
Engine Speed Limiter......................................3-44
Engine..........................................................5-19
Air Cleaner/Filter.........................................5-19
Battery.......................................................5-41
Check and Service Engine Soon Light............3-50
Compartment Overview................................5-12
Coolant Heater............................................2-25
Coolant Temperature Gage...........................3-50
Coolant Temperature Warning Light................3-49
5

Full Floor Console Storage Area.......................2-51
Fuses...........................................................5-94
Fuses and Circuit Breakers...........................5-94
Windshield Wiper.........................................5-93
G
Gage............................................................5-93
Engine Coolant Temperature.........................3-50
Fuel..........................................................3-55
Speedometer..............................................3-43
Tachometer.................................................3-44
Garage Door Opener.......................................2-47
Garment Hooks..............................................2-53
Gasoline......................................................... 5-4
Octane........................................................ 5-4
Speci®cations............................................... 5-5
Gate Operator and Canadian Programming........2-49
Glove Box.....................................................2-51
Glovebox-Mounted CD Changer......................3-100
GM Mobility Program for Persons with
Disabilities.................................................... 7-6
H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-7
Headlamp High/Low-Beam Changer.................... 3-9
Headlamp Wiring............................................5-93
Headlamp......................................................5-49
Aiming.......................................................5-49
Horizontal Aiming.........................................5-50
Vertical Aiming............................................5-50
Headlamps....................................................5-53
Bulb Replacement.......................................5-53
Front Turn Signal, Sidemarker, Parking and
Cornering Lamps......................................5-57
Halogen Bulbs............................................5-53
Heated Seats................................................... 1-4
Highway Hypnosis...........................................4-23
Hill and Mountain Roads..................................4-23
Hitches..........................................................4-37
HomeLink Transmitter, Programming..................2-48
HomeLink
žTransmitter....................................2-47
Hood............................................................5-10
Checking Things Under................................5-10
Release.....................................................5-11
7