Pontiac 2005 Grand Prix - Manual (Page 393)

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 airbag system. Before attempting
to add anything electrical to your vehicle, see Servicing
Your Airbag-Equipped Vehicle on page 1-56.
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 the
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 the 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 to
replace a bad fuse with a new one of the identical
size and rating. Spare fuses and a fuse puller are
located in the underhood fuse block. See Underhood
Fuse Block later in this section.
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