1999 CADILLAC SEVILLE wiring

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2-11
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 with the setting
on AUTO and the temperature between
65F (18C) and 85F (29C). That will
force outside air into your vehicle. See
ªComfort Controlsº 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.
Trunk Lock Release
The trunk lock release button
is located on the left side of
the instrument panel below
the lamp controls. To use this
feature, your vehicle must
be in PARK (P) or
NEUTRAL (N) and the
VALET lockout button must
be in the OFF position.
To open the trunk, press the trunk lock release
button upward.
You can also press the trunk release button on the
Remote Keyless Entry (RKE) transmitter to access the
trunk compartment.

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2-68
When one of the warning lights comes on and stays on
when you are driving, or when one of the gages shows
there may be a problem, check the section that tells you
what to do about it. Please follow this manual's advice.
Waiting to do repairs can be costly
-- and even
dangerous. So please get to know your warning lights
and gages. They're a big help.
Your vehicle also has a Driver Information Center that
works along with the warning lights and gages. See
ªDriver Information Centerº in the Index.
Safety Belt Reminder Light
When the key is turned to ON or START, a chime will
come on for about eight seconds to remind people to
fasten their safety belts.
The safety belt light will
also come on and stay on
for about 70 seconds. If the
driver's belt is already
buckled, neither the chime
nor the light will come on.
Air Bag Readiness Light
There is an air bag readiness light on the instrument
panel, which shows AIR BAG (United States) or the air
bag symbol (Canada). 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 ªAir Bagº
in the Index.
United States Canada
This light will come on when you start your engine, and
it will flash for a few seconds. Then the light should go
out. This means the system is ready.
If the air bag readiness light stays on after you start the
engine or comes on when you are driving, your air bag
system may not work properly. Have your vehicle
serviced right away.

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4-37 Passing
You'll need more passing distance up ahead when
you're towing a trailer. And, because you're a good deal
longer, you'll need to go much farther beyond the
passed vehicle before you can return to your lane.
Backing Up
Hold the bottom of the steering wheel with one hand.
Then, to move the trailer to the left, just move that hand
to the left. To move the trailer to the right, move your
hand to the right. Always back up slowly and, if
possible, have someone guide you.
Making Turns
NOTICE:
Making very sharp turns while trailering could
cause the trailer to come in contact with the
vehicle. Your vehicle could be damaged. Avoid
making very sharp turns while trailering.
When you're turning with a trailer, make wider
turns than normal. Do this so your trailer won't
strike soft shoulders, curbs, road signs, trees or other
objects. Avoid jerky or sudden maneuvers. Signal
well in advance.
Turn Signals When Towing a Trailer
When you tow a trailer, your vehicle may need a
different turn signal flasher and/or extra wiring. Check
with your dealer. The arrows on your instrument panel
will flash whenever you signal a turn or lane change.
Properly hooked up, the trailer lamps will also flash,
telling other drivers you're about to turn, change lanes
or stop.
When towing a trailer, the arrows on your instrument
panel will flash 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.

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6-36
6. Remove the headlamp bulb socket.7. After removing the wiring harness connector from
the headlamp bulb socket, replace the bulb assembly.
Reconnect it to the wiring harness and reinstall the
headlamp bulb assembly back into the
headlamp housing.
8. After reinstalling the bulb and socket, reinstall
the rubber cover. Make sure it fully covers the
headlamp socket.
9. To replace the high
-beam bulb, turn the bulb socket
counterclockwise to unlock the socket from the lamp
housing. Follow the instructions in Step 6 through 8
to install the new bulb.

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6-59
Electrical System
Add-On Electrical Equipment
NOTICE:
Don't add anything electrical to your vehicle
unless you check with your dealer first. 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 ªServicing
Your Air Bag
-Equipped Vehicleº in the Index.
Headlamp Wiring
The headlamp wiring has an individual fuse. 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
A circuit breaker protects the wiper motor. If the wiper
motor overheats due to heavy snow, the wipers will stop
until the motor cools and will then restart.
A MaxiFuse

powers the wiper motor. If the MaxiFuse
blows, there is an electrical problem. Be sure to have
it fixed.
Power Windows and Other Power Options
Circuit breakers protect the power windows. When the
current load is too heavy, the circuit breaker opens and
closes, protecting the circuit until the problem is fixed or
goes away.

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6-60 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 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, 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 MaxiFuses are located in two Bussed Electrical
Centers (BEC), one located near the engine
compartment on the passenger's side and the other under
the rear seat on the driver's side. If a MaxiFuse should
blow, have your vehicle serviced by your
dealer immediately.Underhood Junction Block
The front Bussed Electrical Center (BEC) is located in
the front of the engine compartment between the
windshield washer fluid reservoir and the power steering
fluid reservoir (on the passenger's side). Lift the cover
to gain access.

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8-6
Fog Lamp Light 2-76 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fog Lamps 2-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign Countries, Fuel 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Freeway Driving 4-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
French Language Manual ii. . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Turn Signal Lamps, Bulb Replacement 6
-39 . . . . . . . . .
Fuel 6-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Canada 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door Release 6-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling a Portable Container 6-8 . . . . . . . . . . . . . . . . . . . . . .
Filling Your Tank 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gage 2-77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In Foreign Countries 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Level Low Message 2-82 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses
Circuit Breakers 6
-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Underhood 6-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Underseat 6-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield Wipers 6-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gages
Engine Coolant Temperature 2-72 . . . . . . . . . . . . . . . . . . . .
Fuel 2-77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tachometer 2-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Garment Hooks 2-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GAWR 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gear Positions, Automatic Transaxle 2-24 . . . . . . . . . . . . . . . .
Glove Box 2-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GM Mobility Program for Persons with Disabilities 7-5 . . . . .
Gross Axle Weight Rating (GAWR) 4-30 . . . . . . . . . . . . . . . .
Gross Vehicle Weight Rating (GAWR) 4-30 . . . . . . . . . . . . . .
Guide en Fran†ais ii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GVWR 4
-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Halogen Bulbs 6-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Handles, Assist 2-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hazard Warning Flashers 5-2 . . . . . . . . . . . . . . . . . . . . . . . . . .
Head Restraints 1-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlamps 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Aiming 6-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bulb Replacement 6-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High/Low Beam 2-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suggested Message 2-82 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiper Activated 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring 6-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hearing, Damage 3-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hearing Impaired, Customer Assistance 7-3 . . . . . . . . . . . . . .
Heated Seats 1-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heating 3-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High-Beam Headlamps 2-36 . . . . . . . . . . . . . . . . . . . . . . . . . .
Highway Hypnosis 4-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hill and Mountain Road Driving 4-23 . . . . . . . . . . . . . . . . . . .
Hitches, Trailer 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hood
Checking Things Under 6
-8 . . . . . . . . . . . . . . . . . . . . . . . . .
Release 6-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hooks, Garment 2-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horn 2-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horn Sounds at Lock 2-88 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Add Coolant to the Coolant Surge Tank 5-14 . . . . . . .
How to Reset the Oil Life Indicator 6-15 . . . . . . . . . . . . . . . . .
HVAC Steering Wheel Controls 3-10 . . . . . . . . . . . . . . . . . . .
Hydraulic Brake Warning Lights 2-69 . . . . . . . . . . . . . . . . . . .
Hydroplaning 4-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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8-14
Wheel
Alignment 6-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nut Torque 5-26, 6-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement 6-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wrench 5-19, 5-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Window, Rear Defogger 3-7 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windows 2-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Express-Down 2-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power 2-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Lockout 2-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield Washer 2-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield Washer Fluid 2-39, 6-27 . . . . . . . . . . . . . . . . . . . . Windshield Wipers 2
-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blade Replacement 6-41 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses 6-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rainsense
2-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Winter Driving 4-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiper-Activated Headlamps 2-43 . . . . . . . . . . . . . . . . . . . . . .
Wiring, Headlamps 6-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wood Panels, Cleaning 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . .
Wrecker Towing 5-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wrench, Wheel 5-19, 5-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . .