Jonathan Yarden Jan 30, 2021 · 5 min. read
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.
Year of production: 2003
Floor Console Fuse Block
The floor console fuse block is located to the left of the glove box near the floor.
Fuses | Usage |
1 | Fuse Puller |
2 | Steering Wheel Radio Controls |
3 | Power Door Locks |
4 | Spare |
5 | Spare |
6 | Spare |
7 | Spare |
8 | Spare |
9 | Spare |
10 | Turn Signal and Hazard Lamp Flashers |
11 | Power Seats |
12 | Electronic Level Control (ELC) Compressor |
13 | Liftgate and Endgate |
14 | Rear Auxiliary Power Outlet |
15 | Electronic Level Control (ELC) Compressor Relay and Height Sensor |
16 | Heated Mirrors |
17 | Power Mirrors |
18 | Ignition 1 Module |
19 | Turn Signal Switch and NSBU Switch |
21 | Rear Defogger |
22 | Air bag Module |
24 | Canister Vent Soloid and TCC Switch |
25 | HVAC Blower Motor |
26 | HVAC Mode and Temperature Motors and Head-Up Display |
28 | Not Used |
29 | Windshield Wipers and Washer |
30 | Instrument Panel Cluster, BCM, PASS-Key® III |
31 | Park Lock Ignition Key Solenoid |
32 | Rear Window Wiper/Washer |
34 | Power Sunroof |
35 | Power Windows |
36 | Map Lamps, Courtesy Lamps and Instrument Panel Lights |
37 | Radio |
38 | UQ3 Radio Amplifier |
39 | Head-Up Display |
40 | Hazard Flashers |
41 | Instrument Panel Cluster, HVAC Control, Security LED and Remote Keyless Entry Mode |
42 | PASS-Key® III |
44 | Body Control Module (BCM) |
Relay | Usage |
20 | Rear Defogger Relay |
23 | IGN3 Relay |
27 | Accessory Relay |
33 | Retained Accessory Power Relay |
43 | Accessory Diode |
Underhood Fuse Block
This fuse block is located in the engine compartment, on the passenger’s side of the vehicle.
Circuit Breaker | Usage |
49 | Spare |
Relay | Usage |
50 | Horn |
51 | Fuel Pump |
52 | Air Conditioning Clutch |
53 | Daytime Running Lamps (DRL) |
54 | Low-Beam Headlamps |
55 | Parking Lamps |
56 | High-Beam Headlamps |
57 | Fog Lamps |
58 | Starter Relay |
59 | Cooling Fan |
60 | Ignition 1 Relay |
61 | Cooling Fan |
62 | Cooling Fan |
63 | Air pump |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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