The Buick Lucerne, produced from 2006 to 2011, showcases Buick’s commitment to luxury and modern amenities in the full-size sedan segment. Its advanced electrical system includes essential components such as the fuse box and relays.
The fuse box in the Buick Lucerne 2006–2011 houses fuses designed to protect electrical circuits from overloads and short circuits, ensuring the safety of critical 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 and reliable operation.
Additional sophisticated electrical components in the Buick Lucerne of this era include advanced climate control systems, power-adjustable seats, and premium 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 Lucerne 2006–2011’s electrical systems. Regular inspection and maintenance of these components help ensure the vehicle’s reliability and performance, maintaining its reputation as a luxurious and dependable sedan in Buick’s lineup.
(2006-2011) Buick Lucerne 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 Lucerne 2006-2011 fuse assignment
Year of production: 2006, 2007, 2008, 2009, 2010, 2011
Rear Underseat Fuse Box
It is located under the rear seat (remove the seat and open the fusebox cover).
Fuse Box in the engine compartment
Fuse box diagrams
2006, 2007
Rear Underseat Fuse Box
Assignment of the fuses and relays in the Rear Underseat Fuse Box (2006, 2007)
| № | Description |
|---|---|
| F1 | Amplifier (Option) |
| F2 | Not Used |
| F3 | Interior Lamps |
| F4 | Courtesy/Passenger Side Front Turn Signal |
| F5 | Canister Vent |
| F6 | Magnetic Ride Control Module (Option) |
| F7 | Leveling Compressor |
| F8 | Not Used |
| F9 | Not Used |
| F10 | Switch Dimmer |
| F11 | Fuel Pump |
| F12 | Body Control Module Logic |
| F13 | Airbag |
| F14 | Accessory Power Outlets |
| F15 | Driver’s Side Turn Signal |
| F16 | Passenger Side Rear Turn Signal |
| F17 | Sunroof |
| F18 | Center High-Mounted Stoplamp, Back-up Lamps |
| F19 | Rear Door Locks |
| F20 | Not Used |
| F21 | Radio, S-Band |
| F22 | OnStar® (Option) |
| F23 | Accessory Power Outlet |
| F24 | Driver Door Module |
| F25 | Passenger Door Module |
| F26 | Trunk Release |
| F27 | Heated/Cooled Seats (Option) |
| F28 | Engine Control Module, Transaxle Control Module (ECM/TCM) |
| F29 | Regulated Voltage Control Sense |
| F30 | Daytime Running Lamps |
| F31 | Instrument Panel Harness Module |
| F32 | Not Used |
| F33 | Not Used |
| F34 | Steering Wheel Illumination |
| F35 | Body Harness Module |
| F36 | Memory Seat Module Logic Massage (Option) |
| F37 | Object Detection Sensor (Option) |
| F38 | Not Used |
| F40 | Shifter Solenoid |
| F41 | Retained Accessory Power, Miscellaneous |
| F42 | Driver’s Side Park Lamp |
| F43 | Passenger’s Side Park Lamp |
| F44 | Heated Steering Wheel (Option) |
| F45 | Not Used |
| F46 | Not Used |
| F47 | Heated/Cooled Seats, Ignition 3 (Option) |
| F48 | Ignition Switch |
| F49 | Not Used |
| J-Case Fuse | |
| JC1 | Climate Control Fan |
| JC2 | Rear Defogger |
| JC3 | Electronic Leveling Control/Compressor |
| Circuit Breaker | |
| CB1 | Front Passenger’s Seat, Memory Seat Module |
| CB2 | Driver’s Power Seat, Memory Seat Module |
| CB3 | Door Module, Power Windows |
| CB4 | Not Used |
| Resistor | |
| F39 | Terminating Resistor |
| Relays | |
| R1 | Retained Accessory Power |
| R2 | Park Lamps |
| R3 | Run (Option) |
| R4 | Daytime Running Lamps |
| R5 | Not Used |
| R6 | Trunk Release |
| R7 | Fuel Pump |
| R8 | Not Used |
| R9 | Door Lock |
| R10 | Door Unlock |
| R11 | Not Used |
| R12 | Not Used |
| R13 | Not Used |
| R14 | Rear Defogger |
| R15 | Electronic Leveling Control Compressor |
Engine compartment
Assignment of the fuses and relays in the engine compartment (2006, 2007)
| № | Description |
|---|---|
| F1 | Spare |
| F2 | Driver’s Side Low-Beam |
| F3 | Passenger’s Side Low-Beam |
| F4 | Airbag Ignition |
| F5 | Engine Control Module |
| F6 | Transaxle Ignition |
| F7 | Spare |
| F8 | Spare |
| F9 | Sprare |
| F10 | Passenger’s Side High-Beam Headlamp |
| F11 | Driver’s Side High-Beam Headlamp |
| F12 | Windshield Washer Pump |
| F13 | Spare |
| F14 | Climate Controls, Instrument Panel Cluster |
| F15 | Spare |
| F16 | Fog Lamps |
| F17 | Horn |
| F18 | Windshield Wiper |
| F19 | Driver’s Side Corner Lamp |
| F20 | Passenger’s Side Corner Lamp |
| F21 | Oxygen Sensor |
| F22 | Powertrain |
| F23 | Engine Control Module (ECM), Crank |
| F24 | Injector Coil |
| F25 | Injector Coil |
| F26 | Air Conditioning |
| F27 | Air Solenoid |
| F28 | Engine Control Module, Transaxle Control Module (ECM/TCM) |
| F29 | Spare |
| F30 | Spare |
| F31 | Spare |
| F32 | Spare |
| JC1 | Heated Windshield Washer |
| JC2 | Cooling Fan 1 |
| JC3 | Spare |
| JC4 | Crank |
| JC5 | Cooling Fan 2 |
| JC6 | Anti-lock Brake System 2 |
| JC7 | Anti-lock Brake System 1 |
| JC8 | Air Pump |
| Relays | |
| R1 | Cooling Fan 1 |
| R2 | Cooling Fan |
| R3 | Crank |
| R4 | Powertrain |
| R5 | Spare |
| R6 | Run/Crank |
| R7 | Cooling Fan 2 |
| R8 | Windshield Wiper |
| R9 | Air Pump |
| R10 | Windshield Wiper High |
| R11 | Air Conditioning |
| R12 | Air Solenoid |
2008, 2009, 2010, 2011
Rear Underseat Fuse Box
Assignment of the fuses and relays in the Rear Underseat Fuse Box (2008-2011)
| № | Description |
|---|---|
| 1 | Fuel Pump |
| 2 | Left Park Lamp |
| 3 | Not Used |
| 4 | Right Park Lamp |
| 5 | Engine Control Module (ECM)/ Transmission Control Module (TCM) |
| 6 | Memory Module |
| 7 | Not Used |
| 8 | Steering Wheel Illumination |
| 9 | Front Heated/Cooled Seat Module |
| 10 | Run 2 – Heated/Cooled Seats |
| 11 | Not Used |
| 12 | RPA Module |
| 13 | PASS-Key® III System |
| 14 | Unlock/Lock Module |
| 15 | Magnetic Ride Control |
| 16 | Daytime Running Lamps (DRL) |
| 17 | Sunroof |
| 18 | Body Control Module (BCM) Dim |
| 19 | Body Control Module (BCM) |
| 20 | Run 1-Heated Steering Wheel |
| 21 | Ignition Switch |
| 22 | Driver Door Module |
| 23 | Not Used |
| 24 | Electronic Leveling Control Module |
| 25 | Body Control Module (Left Turn Signal) |
| 26 | Cigarette Lighter, Auxiliary Power Outlet |
| 27 | Not Used |
| 28 | Retained Accessory Power 1 (RAP) |
| 29 | Passenger Door Module |
| 30 | Sensing and Diagnostic Module |
| 31 | Accessory Power Outlets |
| 32 | Body Control Module (BCM) (Inadvertent) |
| 33 | Retained Accessory Power 2 (RAP) |
| 34 | CanisterVent Solenoid |
| 35 | Body Control Module (Courtesy) |
| 36 | Body Control Module (Right Turn Signal) |
| 37 | Trunk Release |
| 38 | Amplifier, Radio |
| 39 | Body Control Module (CHMSL) |
| 40 | Body Control Module |
| 41 | Not Used |
| 42 | OnStar® Module |
| 43 | Body Modules |
| 44 | Radio |
| 45 | Not Used |
| 46 | Rear Defogger (J-Case) |
| 47 | Electronic Leveling Control Compressor (J-Case) |
| 48 | Blower (J-Case) |
| 49 | Not Used |
| Circuit Breaker | |
| 54 | Right Front Seat |
| 55 | Left Front Power Seat |
| 56 | Power Windows |
| 57 | Power Tilt Steering Wheel |
| Resistor | |
| 50 | Terminating Resistor |
| Relays | |
| 51 | Not Used |
| 52 | Rear Defogger |
| 53 | Electronic Leveling Control Compressor |
| 58 | Park Lamps |
| 59 | Fuel Pump |
| 60 | Not Used |
| 61 | Not Used |
| 62 | Unlock |
| 63 | Lock |
| 64 | Run |
| 65 | Daytime Running Lamps |
| 66 | Not Used |
| 67 | Trunk Release |
| 68 | Not Used |
| 69 | Not Used |
| 70 | Retained Accessory Power (RAP) |
Engine compartment
Assignment of the fuses and relays in the engine compartment (2008-2011)
| № | Description |
|---|---|
| 1 | Engine Control Module (ECM), Crank |
| 2 | Fuel Injectors Odd |
| 3 | Fuel Injectors Even |
| 4 | Air Conditioning Clutch |
| 5 | Air Injection Reactor (AIR) Solenoid |
| 6 | Oxygen Sensor |
| 7 | Emission Device |
| 8 | Transmission, Ignition 1 |
| 9 | Engine Control Module (ECM), Powertrain Control Module (PCM) |
| 10 | Climate Control System, Instrument Panel Cluster Ignition 1 |
| 11 | Airbag System |
| 12 | Horn |
| 13 | Windshield Wiper |
| 14 | Fog Lamps |
| 15 | Right High-Beam Headlamp |
| 16 | Left High-Beam Headlamp |
| 17 | Left Low-Beam Headlamp |
| 18 | Right Low-Beam Headlamp |
| 19 | Windshield Washer Pump Motor |
| 20 | Left Front Cornering Lamp |
| 21 | Right Front Cornering Lamp |
| 22 | Air Pump (J-Case) |
| 23 | Antilock Brake System (ABS) (J-Case) |
| 24 | Starter (J-Case) |
| 25 | Antilock Brake System (ABS) Motor (J-Case) |
| 26 | Cooling Fan 2 (J-Case) |
| 27 | Cooling Fan 1 (J-Case) |
| Relays | |
| 29 | Powertrain |
| 30 | Starter |
| 31 | Cooling Fan 2 |
| 32 | Cooling Fan 3 |
| 33 | Cooling Fan 1 |
| 34 | Air Conditioning Clutch |
| 35 | Air Injection Reactor (AIR) Solenoid |
| 36 | Ignition |
| 37 | Air Pump |
Conclusion
For owners and enthusiasts of classic Buick Lucerne models from 2006-2011, 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.
