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In this article, you will find information about the fuses of the Buick LaCrosse (models 2005, 2006, and 2007), including diagrams of the fuse boxes, a list of fuses and relays, their designation, and the location of the fuse blocks within the vehicle.
Checking and Replacing Fuses in Buick LaCrosse
The wiring circuits in the vehicle are protected from short circuits by a combination of fuses, circuit breakers and in the fuse block 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. Make sure a bad fuse is replaced with a new one of the identical size and rating.
Caution!
- Data on the replacement fuse must match the data on the defective fuse.
- Before replacing a fuse, turn every vehicle electrical switch off.
Location of Fuse Boxes
Instrument Panel Fuse Block:
The instrument panel fuse block is located on the passenger’s side of the instrument panel. Pull off the cover labeled FUSES to expose the fuse block.
Circuit breakers in the instrument panel fuse block 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.
Underhood Fuse Block:
Some fuses and relays are located in the underhood fuse block on the passenger’s side of the vehicle in the engine compartment.
Fuse Box Diagrams
2005-2007
Instrument Panel Fuse Block
| Name | Usage |
|---|---|
| DR/LCK TRUNK | Door Locks, Trunk |
| RFA/MOD | Remote Keyless Entry |
| PRK/SWTCH | Ignition Key Lock |
| CLSTR | Cluster |
| STR/WHL/ILLUM | Steering Wheel Controls Illumination |
| ONSTAR/ALDL | OnStar, Data Link |
| INT/ILLUM | Interior Lamps |
| PWR/SEAT | Power Seat |
| S/ROOF | Sunroof |
| CNSTR | Canister Vent |
| HVAC | Climate Control System |
| HAZRD | Turn Signal, Hazard |
| PRK/LAMP | Park Lamps |
| CHMSL/BKUP | Center-High-Mounted Stoplamp / Back-up Lamps |
| PWR/MIR | Power Mirrors |
| CRUISE | Cruise Control |
| RDO/AMP | Radio, Amplifier |
| HTD/SEAT | Heated Seats |
| HTD/MIR | Heated Mirrors |
| PWR/WNDW | Power Window |
| RAP | Retained Accessory Power |
| PRK/LAMP | Park Lamp Relay |
| R/DEFOG | Rear Defogger Relay |
Underhood Fuse Block
| № | Usage |
|---|---|
| 1 | Driver’s Side High-Beam |
| 2 | Passenger’s Side High-Beam |
| 3 | Driver’s Side Low-Beam |
| 4 | Passenger’s Side Low-Beam |
| 5 | Windshield Wiper |
| 6 | Washer / Regulated Voltage Control |
| 7 | Fog Lamps |
| 8 | Transaxle Control Module |
| 9 | Supplemental Inflatable Restraint |
| 10 | Auxiliary Power |
| 11 | Horn |
| 12 | Emission |
| 13 | Air Conditioner Clutch |
| 14 | Oxygen Sensor |
| 15 | Powertrain Control Module |
| 16 | Powertrain Control Module, Electronic Throttle Control |
| 17 | Electronic Throttle Control |
| 18 | Display |
| 19 | Anti-lock Brake Solenoid |
| 20 | Fuel Injector |
| 21 | Transaxle Solenoid |
| 22 | Fuel Pump |
| 23 | Anti-lock Brake System |
| 24 | Ignition |
| 49-54 | Spare Fuses |
| 55 | Fuse Puller |
| 25 | Air Pump |
| 26 | Battery Main 1 |
| 27 | Battery Main 2 |
| 28 | Battery Main 3 |
| 29 | Fan 1 |
| 30 | Battery Main 4 |
| 31 | Anti-lock Brake System Motor |
| 32 | Fan 2 |
| 33 | Starter |
| 34 | Headlamp High-Beam |
| 35 | Headlamp Driver Module (HDM) |
| 36 | Fog Lamp |
| 37 | Ignition 1 |
| 38 | Air Conditioning Compressor |
| 39 | Horn |
| 40 | Powertrain |
| 41 | Fuel Pump |
| 42 | Fan 1 |
| 43 | Fan 3 |
| 44 | Windshield Wiper High |
| 45 | Windshield Wiper |
| 46 | Fan 2 |
| 48 | Crank |