2003 PONTIAC GRAND PRIX wiring

Leaving Your Vehicle
If you are leaving the vehicle, take your keys, open your 1
door and set the locks from inside. Then get out and
dose the door.
ur ’
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.
CAUTION: (Continued) if you must drive with the trunk
lid aen or if
electrical wiring or other cable connections
must pass through the seal between the body
and the trunk lid:
0 Make sure all other windows are shut.
0 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 “Climate Controls”
in the Index.
instrument panel, open them all the way.
If you have air outlets on or under the
See “Engine Exhaust” in the Index.
Trunk Lock
To unlock the trunk from the outside, insert the key into
the lock on the trunk and turn it clockwise. You can also
press the trunk symbol on the remote keyless entry
transmitter.
2-1 1

Safety Belt Reminder Light
When the key is turned to RUN, a chime will come on
for several seconds to remind people to fasten their
safety belts, unless the driver’s safety belt is already
buckled.
The safety belt light will
also come on and stay
on for several seconds,
then
it will flash for
several more.
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 the words SRS 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 Supplemental
Restraint System (SRS)
on page 1-51.
SRS AIR BAG
United States
Canada
This light will come on when you start your vehicle, and
it will flash for a few seconds. Then the light should
go out. This means the system is ready.
3-26

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 have to drive in
THIRD (3) instead of AUTOMATIC OVERDRIVE (D).
Parking on Hills
1 -J really should not ,,rk yo^, wG,kle, 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.
4-42

Section 5 Service and Appearance Care
Appearance Care ............................................ 5.88
Cleaning the Inside of Your Vehicle ................. 5-88
Weatherstrips ............................................... 5-91
Sheet Metal Damage
..................................... 5-93
Finish Damage
............................................. 5-93
Underbody Maintenance
................................ 5-93
Chemical Paint Spotting
................................. 5-94
GM Vehicle CarelAppearance Materials
......... -5-94
Vehicle Identification ...................................... 5-96
Vehicle Identification Number (VIN)
................. 5-96
Service Parts Identification Label
..................... 5-96
Care
of Safety Belts
...................................... 5-91
Cleaning the Outside of Your Vehicle
.............. 5-91
Electrical System .................................... 5.97
Add-on Electrical Equipment
.......................... 5.97
Headlamp Wiring
......................................... 5-97
Windshield Wiper Fuses
................................ 5.97
Power Windows and Other Power Options
....... 5-97
Fuses and Circuit Breakers
........................... 5-97
Capacities and Specifications ........................ 5.102
Capacities and Specifications
........................ 5.102
Normal Maintenance Replacement Parts ......... 5.104
Normal Maintenance Replacement Parts
......... 5.104
5-2

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
Servicing Your Air Bag-Equipped Vehicle on page
1-57.
Headlamp Wiring
The headlamp circuit is protected by individual fuses in
the underhood fuse block. An electrical overload will
cause the fuse to blow. If this happens, have your
headlamp system checked right away.
Windshield Wiper Fuses
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. See Underhood Fuse Block later in
this section.
5-97

Customer Assistance Information (cont.)
Reporting Safety Defects to the United States
Government
.............................................. 7-9
Roadside Assistance Program
......................... 7-5
Service Publications Ordering Information
........ 7-1 0
D
Daytime Running Lamps (DRL) / Automatic
Headlamp System
....................................... 3-1 1
Defensive Driving ............................................. 4-2
Defogging and Defrosting
................................. 3-21
Delayed Exit Lighting
....................................... 3-14
Delayed Illumination and Exit Lighting
................ 2-44
Delayed Lighting
............................................. 3-1 3
Dinghy Towing
................................................ 4-34
Disabling the Theft-Deterrent Feature
................. 3-56
Disarming with the Remote Keyless Entry
Transmitter
................................................. 2-1 6
Disarming with Your Key
.................................. 2-16
Doing Your Own Service Work
........................... 5-4
Dolly Towing
.................................................. 4-34
Door Last Door Closed Locking
.............................. 2-9
Power Door Locks
......................................... 2-9
Programmable Automatic Door Locks
............. 2-1 0
Locks .......................................................... 2-8 Driver
Position. Safety Belt
..................................... 1-12
Six-Way Power Seat
...................................... 1-3
Driver Information Center (DIC)
......................... 3-38
Driving At Night
..................................................... 4-18
City
........................................................... 4-22
Defensive
..................................................... 4-2
Drunken
....................................................... 4-3
Freeway
..................................................... 4-23
Hill and Mountain Roads
.............................. 4-25
In Rain and on Wet Roads
........................... 4-19
Winter
........................................................ 4-27
Driving On Grades
.......................................... 4-42
Driving on Snow or Ice
.................................... 4-28
Driving Through Deep Standing Water
............... 4-21
Driving Through Flowing Water
......................... 4-21
Dual Climate Control System
............................ 3-20
Driving with
a Trailer
....................................... 4-41
Electrical System
Add-on Equipment
.......... ................. 5-97
Fuses and Circuit Breakers
................... 5-97
Headlamp Wiring
......................................... 5-97
Power Windows and Other Power Options
...... 5-97
Windshield Wiper Fuses
............................... 5-97
Emergency Trunk Release Handle
................. 2-12
4

Fuel (cont.)
Gasoline Specifications
................
Low Warning Light ........ , ....
System Inspection .............
Functions ......................................
Fuses
Fuses and Circuit Breakers
....
Windshield Wiper ..............
.........
..........
..........
...........
........
...... 5-5
..... 3-37
..... 6-13
..... 3-39
..... 5-97
..... 5-97
G
Gage
Engine Coolant Temperature
......................... 3-31
Fuel
.......................................................... 3-37
Speedometer
.............................................. 3-25
Tachometer
................................................. 3-25
Garage Door Opener Compartment
................... 2-40
Gasoline Octane
........................................................ 5-5
Specifications ............................................... 5-5
Glass Surfaces
............................................... 5-90
Glove Box ..................................................... 2-40
GM Mobility Program for Persons with
Disabilities
................................... .. 7-5
Hazard Warning Flashers
................................... 3-3
Head Restraints
............................................... 1-6 Headlamp
Aiming
....................................................... 5-59
Headlamp Wiring
............................................ 5-97
Headlamps
.................................................... 5-60
Bulb Replacement
....................................... 5-60
Front Turn Signal and Sidemarker Lamps
....... 5-62
Halogen Bulbs
............................................ 5-60
Head-Up Display (HUD)
................................... 3-15
Heated Seats
................................................... 1-4
Highway Hypnosis
........................................... 4-25
Hill and Mountain Roads
.................................. 4-25
Hitches
.......................................................... 4-40
Hood Checking Things Under
................................ 5-10
Release
..................................................... 5-10
Horn
............................................................... 3-4
How to Add Coolant
to the Coolant
Recovery Tank
............................................ 5-38
How to Add Coolant
to the Radiator .................. 5-41
How to Add Fluid
............................................ 5-29
How to Check
........................................ 5-27, 5-69
How to Check and Add Oil
............................... 5-25
How to Check Power Steering Fluid .................. 5-47
How to Use This Manual ...................................... ii
How to Wear Safety Belts Properly ................... 1-12
Headlamp High/Low-Beam Changer
.................... 3-6
Hydroplaning
.................................................. 4-20
6