2005 PONTIAC GTO wiring

Your vehicle cannot be locked using the remote key if
the key is in the ignition and the ignition is ON.
The vehicle also cannot be locked if the driver’s door
is open.
To use the remote key to lock the doors, both doors must
be closed. If only the passenger’s door is open when the
lock button is pressed, the driver’s door will lock but the
passenger’s door will not. The horn will honk three times
to indicate that the passenger’s door has not locked.
The passenger’s door must be closed and the system
must be reset in order to lock both doors. To reset the
system, press the unlock button and then press the lock
button on the remote key.
Programmable Automatic
Door Locks
Your vehicle is equipped with an automatic door locking
feature which can be programmed through the trip
computer buttons and instrument panel center display.
It can be programmed to be on or off. SeeVehicle
Personalization on page 2-30for more information.
Your vehicle was programmed from the factory
to automatically lock when the shift lever is moved out
of PARK (P).
Trunk
{CAUTION:
It can be dangerous to drive with the trunk lid
open because carbon monoxide (CO) gas can
come into your vehicle. You cannot 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 Climate Control
System in the Index.
If you have air outlets on or under the
instrument panel, open them all the way.
SeeEngine Exhaust on page 2-26.
2-8

How to Detect a Tamper Condition
The exterior turn signals should flash twice when
returning to your vehicle and pressing UNLOCK on the
key. If they flash three times, an attempted break-in
has occurred while the vehicle was armed. If you wish
to find out what set the alarm off, turn the ignition on
and look at the trip computer display for the ALARM
ACTIVATED message being shown. See “Trip Computer
Warning Messages” underTrip Computer on page 3-33.
The ALARM ACTIVATED message will be displayed
first for one second, followed by the trigger point
screens. The trigger point screens will also be displayed
for one second. If more than one trigger point has
been activated, the display will show each trigger point
screen in sequence for one second, returning back
to the ALARM ACTIVATED screen. The alarm screens
will be shown in a continuous cycle until the trip
computer MODE button is pressed. The center display
then reverts to the last screen shown prior to the
ignition being off.
The possible trigger points are the following:
•The hood has been opened.
•The trunk has been opened.
•One of the doors has been opened.
•Hot wiring of the vehicle was attempted (ignition on
without key inserted).
Starting and Operating Your
Vehicle
New Vehicle Break-In
Notice:Your vehicle does not need an elaborate
break-in. But it will perform better in the long run if
you follow these guidelines:
Keep your speed at 55 mph (88 km/h) or less for
the rst 500 miles (805 km).
Do not drive at any one speed, fast or slow,
for the rst 500 miles (805 km). Do not make
full-throttle starts.
Avoid making hard stops for the rst 200 miles
(322 km) or so. During this time your new brake
linings are not yet broken in. Hard stops with
new linings can mean premature wear and
earlier replacement. Follow this breaking-in
guideline every time you get new brake linings.
2-15

Airbag Readiness Light
There is an airbag
readiness light on the
instrument panel which
shows the airbag symbol.
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.
The system checks the airbag’s electrical system for
malfunctions. The light tells you if there is an electrical
problem. The system check includes the airbag
sensors, the airbag modules, the wiring and the
diagnostic module. SeeAirbag System on page 1-44for
more information.If the airbag readiness light stays on after you start the
vehicle or comes on when you are driving, your
airbag system may not work properly. Have your vehicle
serviced right away. The light comes on after an
accident where the airbags were activated.
{CAUTION:
If the airbag readiness light stays on after you
start your vehicle, it means the airbag system
may not be working properly. The airbags in
your vehicle may not inate in a crash, or they
could even inate without a crash. To help avoid
injury to yourself or others, have your vehicle
serviced right away if the airbag readiness light
stays on after you start your vehicle.
3-25

3. Remove the wiring harness connector by squeezing
the two tabs on the connector and pulling the
connector down.
4. Remove the old bulb
by twisting the bulb
counterclockwise.
5. Install the new bulb without touching it.
6. Reverse the steps to reinstall the headlamp
assembly.Front Turn Signal and
Parking Lamps
To replace a front turn signal or parking lamp bulb,
do the following:
1. Open the hood. SeeHood Release on page 5-11
for more information.
2. Follow the removal procedure for either the driver’s
side or passenger’s side of the vehicle to access
the bulbs. SeeHeadlamps on page 5-47for
more information.
3. Disconnect the wiring harness connector from the
bulb assembly.
4. Turn the bulb socket counterclockwise and remove.
5. Lightly press the bulb and twist counterclockwise
out of the socket.
6. Insert the new bulb and install the bulb socket.
The bulb should be colored orange.
7. Reconnect the wiring harness connector.
8. Reinstall the battery or radiator cover. See
Headlamps on page 5-47for more information.
5-49

Fuses and Circuit Breakers
The wiring circuits in your vehicle are protected from
short circuits by fuses, circuit breakers and thermal links
in the wiring itself. This greatly reduces the chance of
fires caused by electrical problems.
Look at the metallic 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 correct size.
If you ever have a problem on the road and don’t have
a spare fuse, you can borrow one. Just 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 size you need. Replace it as soon as
you can.
Before replacing a fuse, turn every vehicle electrical
switch off.
There are two fuse blocks in your vehicle: the
instrument panel fuse block and the engine compartment
fuse block.
Instrument Panel Fuse Block
This fuse block is located under the driver’s side of the
instrument panel. The fuses here protect each
separate circuit including headlamps. There are spare
fuses inside the fuse box. If you have electrical
failure, check here first.
Fuses Usage
FLASHER
UNITHazard Warning Flashers
POWER
WINDOWSPower Window Switches
5-86