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.
Engine Compartment Fuse Block
J-Case | Usage |
6 | Wiper |
12 | Starter |
21 | Rear power windows |
22 | Sunroof |
24 | Front power windows |
26 | Antilock brake system pump |
27 | Electric parking brake |
28 | Rear window defogger |
41 | Brake vacuum pump |
42 | Cooling fan K2 |
45 | Cooling fan K1 |
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Mini Fuses | Usage |
1 | Transmission control moduleâbattery |
2 | Engine control module battery |
5 | Engine Control Module Ignition |
8 | Ignition coilsâeven |
9 | Ignition coilsâodd |
10 | Engine control module |
11 | Post Catalytic Converter Oxygen Sensor Heater |
13 | Trans Ignition/Fuel System Control Module |
16 | MAF |
17 | Airbag Module |
18 | SBZ Ignition |
23 | Variable Effort Steering |
29 | Power Lumbar, Left |
32 | Body control module |
33 | Heated Seat |
34 | Antilock brake system valves |
35 | Amplifier |
36 | AFL Ignition |
37 | Right high-beam |
38 | Left high-beam |
46 | Cooling fan relay |
47 | Pre Catalytic Converter Oxygen Sensor Heater |
48 | Fog lamps |
49 | Right High Intensity Discharge Headlamp |
50 | Left High Intensity Discharge Headlamp |
51 | Horn |
52 | Cluster Ignition |
53 | Inside Rearview Mirror, Rear Vision Camera, Vacuum Pump |
54 | Heating, Ventilation and Air Conditioning |
55 | Outside Rearview Mirror, Universal Garage Door Opener, Window Switch |
56 | Windshield washer |
60 | Heated mirror |
62 | Canister vent |
64 | AFL Battery |
65 | TheftâDeterrent Horn |
67 | Fuel pump power module |
69 | Regulated voltage control sensor |
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Mini Relays | Usage |
7 | Engine control module |
9 | Cooling fan |
13 | Cooling fan |
15 | Run/Crank |
17 | Rear window defogger |
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Micro Relays | Usage |
2 | Starter |
4 | Wiper speed |
5 | Wiper control |
10 | Cooling fan |
14 | Headlamp low-beam |
 Instrument Panel Fuse Block
The instrument panel fuse block is in the instrument panel, on the driver side of the vehicle.
Fuses | Usage |
1 | Steering Wheel Controls Backlight |
2 | Body control module 7 |
3 | Body Control Module 5 |
4 | Radio |
5 | OnStar/Universal handsâfree phone |
6 | Power outlet 1 |
7 | Power outlet 2 |
8 | Body control module 1 |
9 | Body control module 4 |
10 | Body control module 8 |
11 | Front Heater Ventilation Air Conditioning/Blower |
12 | Passenger seat |
13 | Driver seat |
14 | Diagnostic link connector |
15 | Airbag |
16 | Trunk |
17 | Heater Ventilation Air Conditioning Controller |
18 | Radio, OnStar, Universal HandsâFree Phone |
19 | Display |
20 | Automatic Occupant Sensing |
21 | Instrument Panel Cluster |
22 | Discrete Logic Ignition Switch |
23 | Body control module 3 |
24 | Body control module 2 |
25 | Rear Heater Ventilation Air Conditioning/Blower |
26 | AC DC inverter |
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Relays | Usage |
R1 | Trunk relay |
R2 | â |
R3 | Power outlet relay |
Rear Compartment Fuse Block
The rear compartment fuse block is located on the left side of the trunk behind a cover.
Mini Fuses | Usage |
5 | Not Used |
6 | Heated Steering Wheel |
7 | Not Used |
8 | Not Used |
12 | Not Used |
15 | Side Blind Zone, Ultrasonic Rear Park Assist |
18 | Not Used |
17 | Not Used |
18 | PEPS |
19 | Not Used |
20 | Rear Sunshade, Ventilated Seats |
21 | Not Used |
22 | Not Used |
23 | Not Used |
24 | Not Used |
25 | Not Used |
26 | Not Used |
27 | Not Used |
28 | Not Used |
29 | Not Used |
30 | Not Used |
31 | Electronic Suspension Control |
32 | Rear Seat Infotainment |
33 | AllâWheel Drive |
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JâCase Fuses | Usage |
1 | Not Used |
2 | Not Used |
3 | Not Used |
4 | Not Used |
9 | Not Used |
10 | Not Used |
11 | Not Used |
13 | Not Used |
14 | Not Used |
34 | Not Used |
35 | PEPS |
36 | Not Used |
37 | Not Used |
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Relays | Usage |
K1 | Not Used |
K2 | Seat Ventilation, Sunshade |
K3 | Heated Steering Wheel |
K4 | Not Used |
WARNING:Â Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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