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.
Instrument Panel Fuse Block
The instrument panel fuse block is located on the passenger side of the instrument panel.
Fuses | Usage |
DR/LCK TRUNK | Door Locks, Trunk |
RFA/MOD | Remote Keyless Entry |
PRK/SWTCH | Ignition Key Lock |
CLSTR | Cluster |
STR/WHL/ ILLUM | Steering Wheel Controls Illumination |
ONSTAR/ALDL | OnStar®, Data Link |
INT/ILLUM | Interior Lamps |
PWR/SEAT | Power Seat |
S/ROOF | Sunroof |
CNSTR | Canister Vent |
HVAC | Climate Control System |
HAZRD | Turn Signal, Hazard |
PRK/LAMP | Park Lamps |
CHMSL/BKUP | Center-High-Mounted Stoplamp/Back-up Lamps |
PWR/MIR | Power Mirrors |
CRUISE | Cruise Control |
RDO/AMP | Radio, Amplifier |
HTD/SEAT | Heated Seats |
HTD/MIR | Heated Mirrors |
PWR/WNDW | Power Window |
Relays | Usage |
RAP | Retained Accessory Power |
PRK/LAMP | Park Lamp Relay |
R/DEFOG | Rear Defogger Relay |
Underhood Fuse Block
Some fuses and relays are located in the underhood fuse block on the passenger side of the vehicle in the engine compartment.
Mini Fuses | Usage |
1 | Driver Side High-Beam |
2 | Passenger Side High-Beam |
3 | Driver Side Low-Beam |
4 | Passenger Side Low-Beam |
5 | Windshield Wiper |
6 | Washer/Regulated Voltage Control |
7 | Fog Lamps |
8 | Transmission Control Module |
9 | Supplemental Inflatable Restraint |
10 | Auxiliary Power |
11 | Horn |
12 | Emission |
13 | Air Conditioner Clutch |
14 | Oxygen Sensor |
15 | Powertrain Control Module |
16 | Powertrain Control Module, Electronic Throttle Control |
17 | Electronic Throttle Control |
18 | Display |
19 | Antilock Brake Solenoid |
20 | Fuel Injector |
21 | Transmission Solenoid |
22 | Fuel Pump |
23 | Antilock Brake System |
24 | Ignition |
J-Style fuse | Usage |
25 | Air Pump |
26 | Battery Main 1 |
27 | Battery Main 2 |
28 | Battery Main 3 |
29 | Fan 1 |
30 | Battery Main 4 |
31 | Antilock Brake System Motor |
32 | Fan 2 |
33 | Starter |
Micro-Relays | Usage |
34 | Headlamp High-Beam |
35 | Headlamp Driver Module |
36 | Fog Lamp |
37 | Ignition 1 |
38 | Air Conditioning Compressor |
39 | Horn |
40 | Powertrain |
41 | Fuel Pump |
Mini-Relays | Usage |
42 | Fan 1 |
43 | Fan 3 |
44 | Windshield Wiper High |
45 | Windshield Wiper |
46 | Fan 2 |
48 | Crank |
Spare fuses | Usage |
49 | Spare |
50 | Spare |
51 | Spare |
52 | Blank |
53 | Blank |
54 | Blank |
Fuse Puller | Usage |
55 | Fuse Puller |
Diodes | Usage |
Air Conditioner Compressor Clutch Diode |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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