The Buick LeSabre, manufactured between 2000 to 2005, embodies Buick’s commitment to comfort and reliability in the full-size sedan segment. Its electrical system includes critical components such as the fuse box and relays.
The fuse box in the Buick LeSabre 2000-2005 houses fuses designed to protect electrical circuits from overloads and short circuits, ensuring the safety of components like headlights, taillights, and power windows. Relays, serving as electrically controlled switches, manage the flow of electricity to systems such as the starter motor, fuel pump, and cooling fans, ensuring efficient operation.
Additional advanced electrical components in the Buick LeSabre of this era include climate control systems, power-adjustable seats, and audio systems. These features rely on a robust electrical infrastructure to enhance comfort, convenience, and entertainment for occupants.
Understanding the layout and function of the fuse box and relays is crucial for maintaining and troubleshooting the Buick LeSabre 2000-2005’s electrical systems. Regular inspection and maintenance of these components help ensure the vehicle’s reliability and performance, maintaining its reputation as a comfortable and dependable sedan in Buick’s lineup.
(2000-2005) Buick LeSabre fuse box and relay with Diagram
WARNING
- Never replace a fuse with one that has a higher amperage rating.
- A fuse with a too-high amperage could damage the electrical part and cause a fire.
- On no account should fuses be repaired (e.g. patched up with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause a fire.
- If a fuse blows repeatedly, do not keep replacing it. Instead, have the cause for the repeated short circuit or overload tracked and fixed.
- Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
Buick LeSabre 2000-2005 fuse assignment
- Cigar lighter/power outlet fuses in the Buick LeSabre are the fuse №. 65 in the Rear Underseat Fuse Box and fuses №. 22, 23 in the Engine compartment fuse box.
Year of production: 2000, 2001, 2002, 2003, 2004, 2005
Rear Underseat Fuse Box
Fuse Box Location
It is located under the rear seat (remove the seat and open the fuse box cover).
Fuse box diagram
| № | Description |
|---|---|
| 1 | Fuel Pump |
| 2 | HVAC Blower |
| 3 | Memory |
| 4 | Assembly Line Diagnostic Link |
| 5 | 2000-2002: Rear Fog Lamps 2003-2005: 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 | 2000-2002: Not Used 2003-2005: 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 |
| 56 | Circuit Breaker: Power Seats |
| 57 | Circuit Breaker: Power Windows |
| 60 | Not Used |
| 61 | Rear Defog |
| 62 | Not Used |
| 63 | Audio Amplifier |
| 64 | Electronic Level Control (ELC) |
| 65 | 2000-2004: Cigar 2005: Not used |
| 66 | Not Used |
| 67 | Not Used |
| 68 | Not Used |
| 69-74 | Spare fuses |
| 75 | Fuse Puller |
| Relays | |
| 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) |
| 58 | 2000-2004: Cigar 2005: Not used |
| 59 | Rear Defogger |
Fuse Box in the engine compartment
Fuse Box Location
Fuse box diagram
Assignment of the fuses and relays in the уngine compartment
| № | Description |
|---|---|
| 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 |
| 41 | Circuit Breaker: Starter |
| 42 | 2000-2002: A.I.R 2003-2005: Not Used |
| 43 | Empty |
| 44 | ABS |
| 45 | Not Used |
| 46 | Cooling Fan 1 |
| 47 | Cooling Fan 2 |
| 48-52 | Spare fuses |
| 53 | Fuse Puller |
| Relays | |
| 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 | 2000-2002: Air Pump 2003-2005: Not Used |
| 36 | Starter 1 |
| 37 | Cooling Fan 1 |
| 38 | Ignition 1 |
| 39 | Cooling Fan Series/Parallel |
| 40 | Cooling Fan 2 |
Conclusion
For owners and enthusiasts of classic Buick LeSabre models from 2000-2005, understanding the fuse box and relay systems is essential for vehicle maintenance. Regular inspection and maintenance of these components helped ensure the vehicle’s longevity and reliability, preserving its status as a symbol of Buick’s craftsmanship and innovation in the automotive industry during that era.
