Buick LeSabre (2003 – 2004) – fuse box diagram
Year of production: 2003, 2004
Engine Compartment Fuse Block
The engine compartment fuse block is located near the front on the passenger’s side of the vehicle.
| Fuses | Usage |
| 1 | Not Used |
| 2 | Accessory |
| 3 | Windshield Wipers |
| 4 | Not Used |
| 5 | Left Low-Beam Headlamp |
| 6 | Right Low-Beam Headlamp |
| 7 | Instrument Panel |
| 8 | Powertrain Control Module Battery |
| 9 | Right High-Beam Headlamp |
| 10 | Left High-Beam Headlamp |
| 11 | Ignition 1 |
| 12 | Not Used |
| 13 | Transaxle |
| 14 | Cruise Control |
| 15 | Direct Ignition System |
| 16 | Injector Bank #2 |
| 17 | Not Used |
| 18 | Not Used |
| 19 | Powertrain Control Module Ignition |
| 20 | Oxygen Sensor |
| 21 | Injector Bank #1 |
| 22 | Auxiliary Power |
| 23 | Cigarette Lighter |
| 24 | Fog Lamps/Daytime Running Lamps |
| 25 | Horn |
| 26 | Air Conditioner Clutch |
| Relays | Usage |
| 27 | High-Beam Headlamp |
| 28 | Low-Beam Headlamp |
| 29 | Fog Lamps |
| 30 | Daytime Running Lamps |
| 31 | Horn |
| 32 | Air Conditioner Clutch |
| 33 | HVAC Solenoid |
| 34 | Accessory |
| 35 | Not Used |
| 36 | Starter 1 |
| 37 | Cooling Fan 1 |
| 38 | Ignition 1 |
| 39 | Cooling Fan Series/Parallel |
| 40 | Cooling Fan 2 |
| Circuit Breakers | Usage |
| 41 | Starter |
| Fuses | Usage |
| 42 | Not Used |
| 43 | Empty |
| 44 | ABS |
| 45 | Not Used |
| 46 | Cooling Fan 1 |
| 47 | Cooling Fan 2 |
| 48 | Spare |
| 49 | Spare |
| 50 | Spare |
| 51 | Spare |
| 51 | Spare |
| 52 | Spare |
| 53 | Fuse Puller |
Rear Underseat Fuse Block
The rear fuse block is located beneath the rear seat on the driver’s side. The rear seat cushion must be removed to access the fuse block.
| Fuses | Usage |
| 1 | Fuel Pump |
| 2 | HVAC Blower |
| 3 | Memory |
| 4 | Assembly Line Diagnostic Link |
| 5 | Not Used |
| 6 | Compact Disc (CD) |
| 7 | Driver’s Door Module |
| 8 | Air Bag System (SIR) |
| 9 | Not Used |
| 10 | Right Parking Lamp |
| 11 | Vent Solenoid |
| 12 | Ignition 1 |
| 13 | Left Parking Lamp |
| 14 | Dimmer |
| 15 | Satellite Digital Radio |
| 16 | Left Front Heated Sea |
| 17 | Not Used |
| 18 | Rear Door Module |
| 19 | Stoplamp |
| 20 | Park/Reverse |
| 21 | Audio |
| 22 | Retained Accessory Power (RAP) |
| 23 | Not Used |
| 24 | Not Used |
| 25 | Passenger Door Module |
| 26 | Body |
| 27 | Interior Lamps |
| 28 | Not Used |
| 29 | Ignition Switch |
| 30 | Instrument Panel |
| 31 | Right Front Heated Seat |
| 32 | Not Used |
| 33 | HVAC |
| 34 | Ignition 3 Rear |
| 35 | Anti-Lock Brake System (ABS) |
| 36 | Turn Signal/Hazard |
| 37 | HVAC Battery |
| 38 | Dimmer |
| Relays | Usage |
| 39 | Fuel Pump |
| 40 | Parking Lamp |
| 41 | Ignition 1 |
| 42 | Rear Fog Lamp |
| 43 | Not Used |
| 44 | Park |
| 45 | Reverse |
| 46 | Retained Accessory Power (RAP) |
| 47 | Fuel Tank Door Lock |
| 48 | Not Used |
| 49 | Ignition 3 |
| 50 | Fuel Tank Door Release |
| 51 | Interior Lamps |
| 52 | Trunk Release |
| 53 | Front Courtesy Lamps |
| 54 | Not Used |
| 55 | Electronic Level Control (ELC) |
| Circuit Breaker | Usage |
| 56 | Power Seats |
| 57 | Power Windows |
| Relays | Usage |
| 58 | Cigar |
| 59 | Rear Defogger |
| Fuses | Usage |
| 60 | Not Used |
| 61 | Rear Defog |
| 62 | Not Used |
| 63 | Audio Amplifier |
| 64 | Electronic Level Control (ELC) |
| 65 | Cigar |
| 66 | Not Used |
| 67 | Not Used |
| 68 | Not Used |
| 69 | Spare |
| 70 | Spare |
| 71 | Spare |
| 72 | Spare |
| 73 | Spare |
| 74 | Spare |
| 75 | Fuse Puller |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.