Electrical System
Add-On Electrical Equipment
Notice:Don’t add anything electrical to your vehicle
unless you check with your dealer rst. 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, seeServicing
Your Airbag-Equipped Vehicle on page 1-64.
Windshield Wiper Fuses
The windshield wiper motor is protected by a circuit
breaker and a fuse. If the motor overheats due to heavy
snow or ice, the wiper will stop until the motor cools.
If the overload is caused by some electrical problem,
have it xed.
Power Windows and Other
Power Options
Circuit breakers in the fuse panel protect the power
seats. When the current load is too heavy, the circuit
breaker opens and closes, protecting the circuit until the
problem is xed.
Fuses and Circuit Breakers
The wiring circuits in your vehicle are protected from
short circuits by fuses. This greatly reduces the
chance of circuit overload and re caused by
electrical problems.
There are two fuse blocks — the underhood fuse block,
and the instrument panel fuse block.
To identify and check fuses and relays, refer to the
Fuse Usage Chart on the inside surface of the
fuse panel door.
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Fuses Usage
BCM/CLSTRBody Control Module, Instrument
Panel Cluster
INT LTS/
ONSTAR
®Interior Lights/OnStar®
DR LCK Door Locks
Relays Usage
PARK LAMP Parking Lamps Relay
HVAC
BLOWERHeating, Ventilation and Air
Conditioning Blower Motor
DR LCK Door Locks Relay
PASS DR
UNLOCKPassenger Door Unlock Relay
DRV DR
UNLCKDriver Door Unlock Relay
HEAD LAMP Headlamps
Engine Compartment Fuse Block
The engine compartment fuse block is located on the
driver’s side of the engine compartment.
SeeEngine Compartment Overview on page 5-12
for more information on location.
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Fuses Usage
COOL FAN LO Cooling Fan Low
RR DEFOG Rear Window Defogger
ABS Anti-lock Brake System
FOG LP Fog Lamps
IGN Ignition Switch
Relays Usage
ENG MAIN Engine Relay
RR WIPER Rear Window Wiper Relay
FRT WIPER Front Window Wiper Relay
PWR WDW Power Windows Relay
COOL FAN HI Cooling Fan High Relay
WIPER
SYSTEMWiper System Relay
Relays Usage
HORN Horn Relay
DRL Daytime Running Lamps Relay
FUEL PUMP Fuel Pump Relay
STARTER
RELAYStarter Relay
REAR DEFOG Rear Window Defogger Relay
FOG LP Fog Lamp Relay
COOL FAN LO Cooling Fan Low Relay
A/C CLUTCH Air Conditioning Clutch Relay
Circuit Breaker Usage
POWER
SEATSPower Seats
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