1999 PONTIAC GRAND PRIX wiring

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2-22
Trunk
CAUTION:
It can be dangerous to drive with the trunk 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 open or if
electrical wiring or other cable connections must
pass through the seal between the body and
the trunk:

Make sure all other windows are shut.

Turn the fan on your heating or cooling
system to its highest speed with the setting
on VENT. 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
To unlock the trunk from the outside, insert the master
key and turn the key clockwise. You can also press the
trunk symbol on the remote keyless entry transmitter
(if equipped).
Remote Trunk Release (If Equipped)
Press the button behind the
glove box door to unlock
the trunk from inside the
vehicle. The shift lever must
be in PARK (P) for the
remote trunk release button
to work.

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2-71 Air Bag Readiness Light
There is an air bag readiness light on the instrument
panel, which shows SRS AIR BAG. 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.
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.
The air bag readiness light should flash for a few
seconds when you turn the ignition key to RUN. If the
light doesn't come on then, have it fixed so it will be
ready to warn you if there is a problem.
Charging System Light
The charging system light
will come on briefly when
you turn on the ignition, as
a check to show you it's
working. Then it will
go out.
If it stays on, or comes on while you are driving, you
may have a problem with the charging system. It could
indicate that you have a loose drive belt or another
electrical problem. Have it checked right away. Driving
while this light is on could drain your battery.
If you must drive a short distance with the light on, be
certain to turn off all your accessories, such as the radio
and air conditioner.

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4-39 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.
Your vehicle has bulb warning lights. When you plug
a trailer lighting system into your vehicle's lighting
system, its bulb warning lights may not let you know
if one of your lamps goes out. So, when you have a
trailer lighting system plugged in, be sure to check your
vehicle and trailer lamps from time to time to be sure
they're all working. Once you disconnect the trailer
lamps, the bulb warning lights again can tell you if one
of your vehicle lamps is out.
Driving On Grades
Reduce speed and shift to a lower gear before you 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 a long uphill grade, shift down and reduce your
speed to around 45 mph (70 km/h) to reduce the
possibility of engine and transaxle overheating.
If you have overdrive, you may want to drive in
THIRD (3), instead of DRIVE (D).
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.

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6-60
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 is protected by a circuit breaker in
the instrument panel fuse block. An electrical overload
will cause the lamps to go on and off, or in some cases
to remain off. If this happens, have your headlamp
system checked right away.
Windshield Wipers
The windshield wiper motor is protected by a circuit
breaker and a fuse. If the motor overheats due to heavy
snow, etc., the wiper will stop until the motor cools. If
the overload is caused by some electrical problem, have
it fixed.
Power Windows and Other Power Options
Circuit breakers in the fuse panel protect the power
windows and other power accessories. When the current
load is too heavy, the circuit breaker opens and closes,
protecting the circuit until the problem is fixed.
Fuses and Circuit Breakers
The wiring circuits in your vehicle are protected from
short circuits by a combination of fuses, circuit breakers
and fusible thermal links in the wiring itself. 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. Spare fuses are located in the instrument
panel. See ªUnderhood Electrical Centerº in the Index.

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9-5
Finish Damage 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
First Gear, Automatic Transaxle 2-35 . . . . . . . . . . . . . . . . . . .
Flashers, Hazard Warning 5-2 . . . . . . . . . . . . . . . . . . . . . . . . .
Flash-to-Pass Feature 2-47 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flat, If a Tire Goes 5-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flat Tire, Changing 5-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid Capacities 6-66 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluids and Lubricants 7-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fog Lamps 2-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign Countries, Fuel 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . .
French Language Manual ii. . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Turn Signal Bulb Replacement 6
-38 . . . . . . . . . . . . . . . .
Fuel 6-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Canada 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling a Portable Container 6-8 . . . . . . . . . . . . . . . . . . . . . .
Filling Your Tank 6-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gage 2-80 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In Foreign Countries 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Light 2-81 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Used Message 2-90 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses and Circuit Breakers 6-60 . . . . . . . . . . . . . . . . . . . . . . .
Gages
Boost 2-91 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Coolant Temperature 2-80 . . . . . . . . . . . . . . . . . . . .
Fuel 2-80 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Garage Door Opener 2-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GAWR 4-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gear Positions, Automatic Transaxle 2-32 . . . . . . . . . . . . . . . .
Glove Box 2-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GM Mobility Program for Persons with Disabilities 8-7 . . . . .
Graphic Equalizer 3-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gross Axle Weight Rating 4-32 . . . . . . . . . . . . . . . . . . . . . . . . Gross Vehicle Weight Rating 4
-32 . . . . . . . . . . . . . . . . . . . . . .
Guide en Fran†ais ii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GVWR 4
-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Halogen Bulbs 6-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hazard Warning Flashers 5-2 . . . . . . . . . . . . . . . . . . . . . . . . . .
Head Restraints 1-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlamps 2-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bulb Replacement 6-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High/Low Beam Changer 2-47 . . . . . . . . . . . . . . . . . . . . . .
Wiring 6-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Head-Up Display 2-82 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Head-Up Display, Care of 2-84 . . . . . . . . . . . . . . . . . . . . . . . .
Hearing Impaired, Customer Assistance 8-5 . . . . . . . . . . . . . .
Heated Seat 1-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heating 3-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High-Beam Headlamps 2-47 . . . . . . . . . . . . . . . . . . . . . . . . . .
Highway Hypnosis 4-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hill and Mountain Roads 4-25 . . . . . . . . . . . . . . . . . . . . . . . . .
Hitches, Trailer 4-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hood
Checking Things Under 6
-8 . . . . . . . . . . . . . . . . . . . . . . . . .
Release 6-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horn, Full Floating 2-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HUD 2-82 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydroplaning 4-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Positions 2-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Transaxle Lock Check 7-17 . . . . . . . . . . . . . . . . . . . .
Illuminated Entry 2-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation, Tire 6-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inside Day/Night Rearview Mirror 2-57 . . . . . . . . . . . . . . . . .

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9-12
Transaxle Fluid, Automatic 6-22 . . . . . . . . . . . . . . . . . . . . . . .
Transmitters 2-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Matching to Your Vehicle 2-10 . . . . . . . . . . . . . . . . . . . . . .
Remote Keyless Entry 2-8 . . . . . . . . . . . . . . . . . . . . . . . . . .
Resynchronization 2-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transportation, Courtesy 8-10 . . . . . . . . . . . . . . . . . . . . . . . . .
Trip 2-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Before Leaving On A Long 4-23 . . . . . . . . . . . . . . . . . . . . .
Computer 2-88, 2-89 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Odometer 2-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trunk 2-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Access Panel 2-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ajar Light 2-87, 2-91 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lock 2-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounted CD Changer 3-19 . . . . . . . . . . . . . . . . . . . . . . . . .
Release, Remote 2-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TTY Users 8-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn and Lane Change Signals 2-47 . . . . . . . . . . . . . . . . . . . .
Turn Signal on Chime 2-47 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signal/Multifunction Lever 2-46 . . . . . . . . . . . . . . . . . . .
Turn Signals When Towing a Trailer 4-39 . . . . . . . . . . . . . . . .
Underbody Flushing Service 7-17 . . . . . . . . . . . . . . . . . . . . .
Underbody Maintenance 6-57 . . . . . . . . . . . . . . . . . . . . . . . . .
Underhood Electrical Center (Passenger's Side) 6-63 . . . . . . .
Vehicle
Control 4-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Damage Warnings iv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 6
-68 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identification Number 6-59 . . . . . . . . . . . . . . . . . . . . . . . . .
Loading 4-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Recreational Towing 4
-31 . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage 6-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ventilation System 3-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Visor Vanity Mirrors 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Visors, Sun 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warning Devices 5-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warning Lights, Gages and Indicators 2-70 . . . . . . . . . . . . . . .
Warranty Information 8-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Washer Fluid
Low Light 2
-87, 2-90 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield 6-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Washing Your Vehicle 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weatherstrips 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel
Alignment 6
-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nut Torque 5-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement 6-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wrench 5-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windows 2-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windows, Power 2-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield Washer 2-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid 6-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid Level Check 7-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield Wipers 2-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blade Cleaning 6-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blade Replacement 6-42 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses 6-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Winter Driving 4-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiper Blade Check 7-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiper Blades, Cleaning 7-15 . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring, Headlamp 6-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wrench, Wheel 5-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .