In this article you will find a description of fuses and relays Buick,
with photos of block diagrams and their locations.
Highlighted the cigarette lighter fuse (as the most popular thing people look for).
Get tips on blown fuses, replacing a fuse, and more.
Main Instrument Panel Fuse Block
The main instrument panel fuse block is located under the instrument panel, on the passenger’s side of the vehicle.
Fuses | Usage |
SBM | Interior Lamps |
PDM | PDM Module |
A/C | HVAC Motor, HVAC Mix Motors |
IGN SEN | Electrochromic Mirror, Driver HTS Seat, Rear Defog Relay, MEM Module, Cool LVL Sensor, Pass Heated Seat |
ELC | HVAC Flat Pk Mtrs, Electronic Level Control Sensor, Electronic Level Control Sensor (R Bec) |
ABS | Anti-Lock Brake System Module |
HVAC | HVAC Main Con Head, HVAC Programmer, Instrument Panel Cluster |
CR CONT | Stepper Motor Cruise, Cruise Switch |
HUD | Head-Up Display Switch, Head-Up Display |
CSTR/SBM | HVAC Programmer, Instrument Panel Cluster, SBM (275 to LCM) (1135 to BTSI SL) |
LP PK L | Underhood Lamp, Left Park/Sidemarker, Left Park/Turn Lamp, SBM, Left Tail Signal Lamp, Left Tail/Stoplamp, Left Rear Sidemarker |
LP PK R | Right Park/Sidemarker Lamp, Right Park/Turn Lamp, Right Tail/Sign Lamp, Right Tail/Stoplamp, Right Rear Sidemarker, Stop/Taillamp, Tail/Signal Lamp, License Lamp, RFA |
RUN | Run/Accessory |
WSW | Wiper Motor |
Blank | Not Used |
WSW/RFA | Wiper Switch, RFA, Rain Sense |
B/U LP | Electrochromic Mirror, Back-Up Lamps |
Auxiliary Instrument Panel Fuse Block
The auxiliary instrument panel fuse block is located under the instrument panel, on the passenger’s side of the vehicle.
Fuses | Usage |
PERIM LP | Perimeter Lamps |
ACCY | Accessory |
IGN 3 | Ignition 3 |
Underhood Fuse Block
There are additional fuses located in the engine compartment on the passenger’s side of the vehicle.
Mini Fuses | Usage |
1 | Air Sol |
2 | SBM, LCM |
3 | Turn Signal |
4 | Pre-Oxygen Sensor, Post-Oxygen Sensor |
5 | Air Bag (SIR) |
6 | Powertrain Control Module |
7 | Air Conditioning Clutch |
8 | Ignition Feed |
9 | Horn Relay |
10 | Spare |
11 | Spare |
12 | Injectors #1-6 |
13 | C-31 |
14 | Right High Beam |
15 | Spare |
16 | Left High Beam |
17 | Spare |
18 | Right Low Beam |
19 | Left Low Beam |
20 | Stop |
21 | Fuel Pump Relay (Wire in BEC) |
22 | Run/Crank |
23 | Powertrain Control Module |
24 | Parking Lamps |
25 | Hazard Flashers |
26 | Spare |
27 | Spare |
28 | ABS #2 |
Mini Relays | Usage |
29 | Ignition |
30 | Horn |
31 | Cooling Fan 1 |
32 | Starter |
33 | Not Used |
34 | Cooling Fan SP |
35 | Cooling Fan 2 |
36 | Air Conditioning Clutch |
37 | Fuel Pump |
Micro Relays | Usage |
36 | Air Conditioning Clutch |
37 | Fuel Pump |
Fuses | Usage |
38 | Bat #1 |
39 | Blower Motor |
40 | Cooling Fan 1 |
41 | Headlamp |
42 | BAT #2 |
43 | Ignition |
44 | Starter |
45 | ABS |
46 | Fuse Puller |
Rear Compartment Fuse Block
Additional fuses are located in the fuse center under the rear seat. The rear seat cushion must be removed to access the fuses.
Mini Relays | Usage |
1 | Heated Backlite |
Relays | Usage |
2 | Retained Accessory Power (RAP) |
3 | Trunk Release |
4 | Electronic Level Control |
5 | Power Seat |
6 | Electronic Level Control Sensor, Electronic Level Control Compressor Solenoid |
Mini Fuses | Usage |
7 | Crank |
8 | Accessory Outlet |
9 | Powertrain Control Module for Cruise |
10 | SBM Module |
11 | Radio/Phone |
12 | Sunroof |
13 | Spare |
14 | CD Changer, Phone |
15 | Driver Door Module |
16 | Spare |
17 | Radio |
18 | Driver Heated Seat Module |
19 | Rear Door Module |
20 | Trunk Release |
21 | Spare |
22 | Instrument Panel Ashtray Cigarette Lighter |
23 | Spare |
24 | Spare |
25 | Passenger Heated Seat Module |
26 | Right Rear Cig Lighter |
27 | Left Rear Cig Lighter |
28 | RFA, Memory Seat Module, Driver Seat Switch |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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