The Buick LeSabre, manufactured in 1999, 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 1999 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 1999’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.
(1999) 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 1999 fuse assignment
Year of production: 1999
Driver’s Side Fuse Block
The driver’s side fuse block is to the left of the steering wheel, under the instrument panel.
| Fuses | Usage |
| 1 | Not Used |
| 2 | Not Used |
| 3 | Power Seats Circuit Breaker |
| 4 | Not Used |
| 5 | Not Used |
| 1A | PASS Key |
| 2A | Spare |
| 3A | Not Used |
| 4A | Not Used |
| 5A | Auto HVAC, ALM, Cruise Control, Cluster |
| 6A | Courtesy Lamps, Power Mirrors |
| 7A | Not Used |
| 8A | Perimeter Lighting |
| 9A | Not Used |
| 1B | Turn Signal, Back-Up Lamps, BTSI |
| 2B | Spare |
| 3B | Not Used |
| 4B | Not Used |
| 5B | Anti-Lock Brake System, Computer Command Control |
| 6B | Brake and Hazard Lamps |
| 7B | Not Used |
| 8B | Interior Lighting |
| 9B | Cigarette Lighter |
| 1C | Air Bag System |
| 2C | Spare |
| 3C | Not Used |
| 4C | Not Used |
| 5C | Cooling Fans, Transaxle |
| 6C | Parking Lamps, Interior Lamps |
| 7C | Not Used |
| 8C | Parking Lamps |
| 9C | Radio, Cluster |
| 1D | Telltale, Chime, Cluster, RAC, LCM |
| 2D | Spare |
| 3D | Heated Mirrors |
| 4D | Not Used |
| 5D | Manual A/C |
| 6D | Not Used |
| 7D | TCC |
| 8D | Radio |
| 9D | Not Used |
| 1E | Not Used |
| 2E | Air Bag System, PASS-Key |
| 3E | Not Used |
| 4E | Not Used |
| 5E | Rear Defog |
| 6E | Not Used |
| 7E | Miscellaneous Engine-Non OBD II |
| 8E | Wipers, Washer |
| 9E | Not Used |
Passenger’s Side Fuse Block
Additional fuses are located in the relay center, on the passenger’s side, below the instrument panel.
| Fuses | Usage |
| 1 | Door Locks |
| 2 | Trunk Release, RAC |
| 3 | Horns |
| 4 | Not Used |
| 5 | Miscellaneous Engine Controls (OBD II) |
| 6 | Fuel Pump |
| 7 | Injectors |
| 8 | Powertrain Control Module |
| 9 | Not Used |
| 10 | Not Used |
| 11 | A/C Programmer |
| 12 | Not Used |
Conclusion
For owners and enthusiasts of classic Buick LeSabre model of 1999, 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.
