Buick LaCrosse (2010) – fuse box diagram
Year of production: 2010
Engine Compartment Fuse Block
| J-Case | Usage |
| 6 | Wiper |
| 12 | Starter |
| 21 | Rear power windows |
| 22 | Sunroof |
| 24 | Front power windows |
| 26 | Antilock brake system pump |
| 27 | Electric parking brake |
| 28 | Rear window defogger |
| 41 | Brake vacuum pump |
| 42 | Cooling fan K2 |
| 45 | Cooling fan K1 |
| Mini Fuses | Usage |
| 1 | Transmission control module–battery |
| 2 | Engine control module battery |
| 5 | Engine Control Module Ignition |
| 8 | Ignition coils–even |
| 9 | Ignition coils–odd |
| 10 | Engine control module |
| 11 | Post Catalytic Converter Oxygen Sensor Heater |
| 13 | Trans Ignition/Fuel System Control Module |
| 16 | MAF |
| 17 | Airbag Module |
| 18 | SBZ Ignition |
| 23 | Variable Effort Steering |
| 29 | Power Lumbar, Left |
| 32 | Body control module |
| 33 | Heated Seat |
| 34 | Antilock brake system valves |
| 35 | Amplifier |
| 36 | AFL Ignition |
| 37 | Right high-beam |
| 38 | Left high-beam |
| 46 | Cooling fan relay |
| 47 | Pre Catalytic Converter Oxygen Sensor Heater |
| 48 | Fog lamps |
| 49 | Right High Intensity Discharge Headlamp |
| 50 | Left High Intensity Discharge Headlamp |
| 51 | Horn |
| 52 | Cluster Ignition |
| 53 | Inside Rearview Mirror, Rear Vision Camera, Vacuum Pump |
| 54 | Heating, Ventilation and Air Conditioning |
| 55 | Outside Rearview Mirror, Universal Garage Door Opener, Window Switch |
| 56 | Windshield washer |
| 60 | Heated mirror |
| 62 | Canister vent |
| 64 | AFL Battery |
| 65 | Theft?Deterrent Horn |
| 67 | Fuel pump power module |
| 69 | Regulated voltage control sensor |
| Mini Relays | Usage |
| 7 | Engine control module |
| 9 | Cooling fan |
| 13 | Cooling fan |
| 15 | Run/Crank |
| 17 | Rear window defogger |
| Micro Relays | Usage |
| 2 | Starter |
| 4 | Wiper speed |
| 5 | Wiper control |
| 10 | Cooling fan |
| 14 | Headlamp low-beam |
Instrument Panel Fuse Block
The instrument panel fuse block is in the instrument panel, on the driver side of the vehicle.
| Fuses | Usage |
| 1 | Steering Wheel Controls Backlight |
| 2 | Body control module 7 |
| 3 | Body Control Module 5 |
| 4 | Radio |
| 5 | OnStar/Universal hands–free phone |
| 6 | Power outlet 1 |
| 7 | Power outlet 2 |
| 8 | Body control module 1 |
| 9 | Body control module 4 |
| 10 | Body control module 8 |
| 11 | Front Heater Ventilation Air Conditioning/Blower |
| 12 | Passenger seat |
| 13 | Driver seat |
| 14 | Diagnostic link connector |
| 15 | Airbag |
| 16 | Trunk |
| 17 | Heater Ventilation Air Conditioning Controller |
| 18 | Radio, OnStar, Universal Hands?Free Phone |
| 19 | Display |
| 20 | Automatic Occupant Sensing |
| 21 | Instrument Panel Cluster |
| 22 | Discrete Logic Ignition Switch |
| 23 | Body control module 3 |
| 24 | Body control module 2 |
| 25 | Rear Heater Ventilation Air Conditioning/Blower |
| 26 | AC DC inverter |
| Relays | Usage |
| R1 | Trunk relay |
| R2 | — |
| R3 | Power outlet relay |
Rear Compartment Fuse Block
The rear compartment fuse block is located on the left side of the trunk behind a cover.
| Mini Fuses | Usage |
| 5 | Not Used |
| 6 | Heated Steering Wheel |
| 7 | Not Used |
| 8 | Not Used |
| 12 | Not Used |
| 15 | Side Blind Zone, Ultrasonic Rear Park Assist |
| 18 | Not Used |
| 17 | Not Used |
| 18 | PEPS |
| 19 | Not Used |
| 20 | Rear Sunshade, Ventilated Seats |
| 21 | Not Used |
| 22 | Not Used |
| 23 | Not Used |
| 24 | Not Used |
| 25 | Not Used |
| 26 | Not Used |
| 27 | Not Used |
| 28 | Not Used |
| 29 | Not Used |
| 30 | Not Used |
| 31 | Electronic Suspension Control |
| 32 | Rear Seat Infotainment |
| 33 | All?Wheel Drive |
| J?Case Fuses | Usage |
| 1 | Not Used |
| 2 | Not Used |
| 3 | Not Used |
| 4 | Not Used |
| 9 | Not Used |
| 10 | Not Used |
| 11 | Not Used |
| 13 | Not Used |
| 14 | Not Used |
| 34 | Not Used |
| 35 | PEPS |
| 36 | Not Used |
| 37 | Not Used |
| Relays | Usage |
| K1 | Not Used |
| K2 | Seat Ventilation, Sunshade |
| K3 | Heated Steering Wheel |
| K4 | Not Used |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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