Table of Contents
This article provides a comprehensive overview of the fuse box diagrams for the Buick LeSabre (Series 4G; eighth generation), covering the 2000, 2001, 2002, 2003, 2004, and 2005 model years.
Fuse #23 in the engine compartment fuse block protects the circuit for the cigarette lighter and 12V auxiliary power outlet.
Engine Compartment Fuse Block
This fuse block is located on the left side of the engine compartment, beneath a protective plastic cover.
Example of fuse block access.
| Diagram | |
|---|---|
|
|
| No. | Description |
| Relays | |
| 27 | High-Beam Headlamps |
| 28 | Low-Beam Headlamps |
| 29 | Fog Lamps Relay |
| 30 | Daytime Running Lamps (DRL) |
| 31 | Horn Relay |
| 32 | A/C Compressor Clutch |
| 33 | HVAC Blend Door Solenoid |
| 34 | Accessory Power Relay |
| 35 | Secondary Air Injection (A.I.R.) Pump (2000–2002) |
| Not Used (2003–2005) | |
| 36 | Starter Motor 1 |
| 37 | Cooling Fan 1 |
| 38 | Ignition 1 |
| 39 | Cooling Fan Series/Parallel |
| 40 | Cooling Fan 2 |
| Fuses | |
| 1 | Not Used |
| 2 | Accessory Power |
| 3 | Windshield Wipers |
| 4 | Not Used |
| 5 | Left Low-Beam Headlamp |
| 6 | Right Low-Beam Headlamp |
| 7 | Instrument Panel |
| 8 | Powertrain Control Module (PCM) – Battery |
| 9 | Right High-Beam Headlamp |
| 10 | Left High-Beam Headlamp |
| 11 | Ignition 1 |
| 12 | Not Used |
| 13 | Transaxle |
| 14 | Cruise Control System |
| 15 | Direct Ignition System (DIS) |
| 16 | Fuel Injectors (Bank 2) |
| 17 | Not Used |
| 18 | Not Used |
| 19 | Powertrain Control Module (PCM) – Ignition |
| 20 | Oxygen Sensor (O2) |
| 21 | Fuel Injectors (Bank 1) |
| 22 | Auxiliary Power Outlet |
| 23 | Cigarette Lighter |
| 24 |
|
| 25 | Horn |
| 26 | A/C Compressor Clutch |
| 41 | Starter (Circuit Breaker) |
| 42 | Secondary Air Injection (A.I.R.) System (2000–2002) |
| Not Used (2003–2005) | |
| 43 | Not Used |
| 44 | Anti-Lock Braking System (ABS) |
| 45 | Not Used |
| 46 | Cooling Fan 1 |
| 47 | Cooling Fan 2 |
| 48-52 | Spare Fuses |
| 53 | Fuse Puller |
Rear Underseat Fuse Block
This fuse block is located beneath the rear passenger seat cushion.
To access it, remove the rear seat cushion and unlatch the plastic cover.
Overview of the rear underseat fuse block.
| Diagram | |
|---|---|
|
|
| No. | Description |
| Relays | |
| 39 | Fuel Pump Relay |
| 40 | Parking Lamps |
| 41 | Ignition 1 |
| 42 | Rear Fog Lamps |
| 43 | Spare |
| 44 | Park |
| 45 | Reverse |
| 46 | Retained Accessory Power (RAP) |
| 47 | Fuel Filler Door Lock |
| 48 | Spare |
| 49 | Ignition 3 |
| 50 | Fuel Filler Door Release |
| 51 | Interior Lamps |
| 52 | Trunk Release |
| 53 | Front Courtesy Lamps |
| 54 | Spare |
| 55 | Electronic Level Control (ELC) Unit |
| 58 | Cigarette Lighter Relay (2000–2004) |
| Spare (2005) | |
| 59 | Rear Window Defogger Relay |
| Fuses | |
| 1 | Fuel Pump |
| 2 | HVAC Blower Motor |
| 3 | Memory Seat Module |
| 4 | Assembly Line Diagnostic Link (ALDL) |
| 5 | Rear Fog Lamps (2000–2002) |
| Spare (2003–2005) | |
| 6 | Compact Disc (CD) Module |
| 7 | Driver Door Module (DDM) |
| 8 | Supplemental Inflatable Restraint (SIR) / Airbag System |
| 9 | Spare |
| 10 | Right Parking Lamp |
| 11 | Evaporative Emissions Vent Solenoid |
| 12 | Ignition 1 |
| 13 | Left Parking Lamp |
| 14 | Dimmer |
| 15 | Spare (2000–2002) |
| Digital Satellite Radio (2003–2005) | |
| 16 | Heated Seat (Left Front) |
| 17 | Spare |
| 18 | Rear Door Module |
| 19 | Stop Lamps |
| 20 | Park / Reverse Lamps |
| 21 | Audio System |
| 22 | Retained Accessory Power (RAP) |
| 23 | Spare |
| 24 | Spare |
| 25 | Passenger Door Module (PDM) |
| 26 | Body Control Module (BCM) |
| 27 | Interior Lamps |
| 28 | Spare |
| 29 | Ignition Switch |
| 30 | Instrument Panel |
| 31 | Heated Seat (Right Front) |
| 32 | Spare |
| 33 | HVAC System |
| 34 | Ignition 3 (Rear) |
| 35 | Anti-Lock Braking System (ABS) |
| 36 | Turn Signal / Hazard Flashers |
| 37 | HVAC – Battery |
| 38 | Dimmer |
| 56 | Power Seats (Circuit Breaker) |
| 57 | Power Windows (Circuit Breaker) |
| 60 | Spare |
| 61 | Rear Window Defogger |
| 62 | Spare |
| 63 | Audio Amplifier |
| 64 | Electronic Level Control (ELC) |
| 65 | Cigarette Lighter (2000–2004) |
| Spare (2005) | |
| 66 | Spare |
| 67 | Spare |
| 68 | Spare |
| 69-74 | Spare |
| 75 | Fuse Puller |
