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.
Floor Console Fuse Block
The floor console fuse block is located to the left of the glove box near the floor.
Fuses |
Usage |
1 |
Empty |
2 |
Steering Wheel Radio Controls |
3 |
Power Door Locks |
4 |
Empty |
5 |
Empty |
6 |
Empty |
7 |
Empty |
8 |
Empty |
9 |
Empty |
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 |
21 |
Rear Defogger |
22 |
Airbag Module |
24 |
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, Body Control Module (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, Climate Control, Security LED and Remote Keyless Entry Mode |
42 |
PASS-Key® III |
44 |
Body Control Module (BCM) |
46 |
Automatic Occupant Sensing Module |
Relay |
Usage |
20 |
Rear Defogger Relay |
23 |
Ignition Relay |
27 |
Accessory Relay |
33 |
Retained Accessory Power Relay |
43 |
Accessory Diode |
45 |
Back-Up Lamps |
Underhood Fuse Block
This fuse block is located in the engine compartment, on the passenger’s side of the vehicle.
3400 V6 Engine
Fuses |
Usage |
1 |
Fuel Pump |
2 |
Air Conditioning Compressor Clutch |
3 |
Horn |
4 |
Engine Controls-Emissions and Sensors |
5 |
Power Control Module (PCM)-Battery Power |
6 |
Anti-Lock Brakes (ABS) Control Module |
7 |
Transaxle Solenoids |
9 |
Anti-lock Brake System (ABS) Solenoids Valves |
10 |
Oxygen Sensors-Emissions Control |
11 |
Fuel Injectors (Even) |
13 |
Engine Controls |
14 |
Daytime Running Lamps (DRL) |
15 |
Passenger’s Low-Beam Headlamp |
17 |
Driver’s Low-Beam Headlamp |
18 |
Driver’s High-Beam Headlamp |
19 |
Ignition Switch Battery Power |
20 |
Parking Lamps |
23 |
Passenger’s High-Beam Headlamp |
24 |
Vent Solenoids |
25 |
DVD |
26 |
Front Fog Lamps |
27 |
Ignition Relay, Neutral Start Switch, Powertrain Control Module (PCM) |
28 |
Body Control Module-Battery Power |
29 |
S Band, Remote Digital Radio Receiver |
30 |
All-Wheel Drive (AWD) Module |
31 |
Cruise Control |
32 |
Front Power Outlets/Lights, OnStar® |
33 |
Automatic Transaxle Shift Lock Control System |
34 |
Starter Solenoid Battery Fuse |
35 |
Anti-lock Brake System (ABS) Motor |
38 |
Engine Cooling Fan 2 |
39 |
Engine Cooling Fan 1 |
40 |
Main Battery Fuse for Retained Accessory Power Relay and Accessory Relay |
41 |
Main Battery Fuse for Heated Seats, Air |
44 |
Main Battery Fuse for Power Outlets, Level Control, Power Seats and Mirrors and Body Computer |
46 |
Main Battery Fuse for Climate Control Blower and Ignition 3 Relay |
47 |
Main Battery Fuse for Ignition Switch, Radio, Heads-Up Display, Remote Keyless Entry (RKE), Instrument Cluster, Air Conditioning and Body Computer |
70 |
Diode for Air Conditioning Compressor Clutch |
Relay |
Usage |
49 |
Horn |
50 |
Fuel Pump |
51 |
Air Conditioning Clutch |
52 |
Daytime Running Lamps (DRL) |
53 |
Low-Beam Headlamps |
54 |
Parking Lamps |
55 |
High-Beam Headlamps |
56 |
Fog Lamps |
57 |
Starter Relay |
58 |
Cooling Fan Series/Parallel |
59 |
Ignition 1 Relay |
60 |
Cooling Fan 2 |
61 |
Cooling Fan 1 |
3.6L V6 Engine
Fuses |
Usage |
1 |
Fuel Pump |
2 |
Air Conditioning Compressor Clutch |
3 |
Horn |
4 |
Anti-lock Brake System (ABS) |
5 |
Engine Control Module (ECM) |
6 |
Powertrain Relay |
7 |
Powertrain Sensors |
8 |
Transmission Control Module (TCM) |
9 |
Anti-lock Brake System (ABS) Solenoids Valves |
10 |
Oxygen Sensor/MAF Sensor |
11 |
Fuel Injectors (Even) |
13 |
Fuel Injectors (Odd) |
14 |
Daytime Running Lamps (DRL) |
15 |
Passenger’s Low-Beam Headlamp |
16 |
Transmission |
17 |
Driver’s Low-Beam Headlamp |
18 |
Driver’s High-Beam Headlamp |
19 |
Ignition Switch Battery Power |
20 |
Parking Lamps |
21 |
Engine Control Module (ECM) |
23 |
Passenger’s High-Beam Headlamp |
24 |
Vent Solenoids |
25 |
DVD |
26 |
Front Fog Lamps |
27 |
Ignition Relay |
28 |
Body Control Module (BCM) |
29 |
S Band |
30 |
All-Wheel Drive (AWD) Module |
31 |
Cruise Control |
32 |
Front Power Outlets/Lights, OnStar® |
33 |
Automatic Transaxle Shift Lock Control System |
34 |
Starter Solenoid Battery Fuse |
35 |
Anti-lock Brake System (ABS) Motor |
38 |
Engine Cooling Fan 2 |
39 |
Engine Cooling Fan 1 |
40 |
Main Battery Fuse for Retained Accessory Power Relay and Accessory Relay |
41 |
Main Battery Fuse for Heated Seats, Air Conditioning, Defogger |
44 |
Main Battery Fuse for Power Outlets, Level Control, Power Seats, Mirrors, and Body Computer |
46 |
Main Battery Fuse for Climate Control Blower and Ignition 3 Relay |
47 |
Main Battery Fuse for Ignition Switch, Radio, Heads-Up Display (HUD), Remote Keyless Entry (RKE), Instrument Cluster, Air Conditioning, and Body Computer |
70 |
Diode for Air Conditioning Compressor Clutch |
71 |
Diode for Ignition |
Relay |
Usage |
49 |
Horn |
50 |
Fuel Pump |
51 |
Air Conditioning Clutch |
52 |
Daytime Running Lamps (DRL) |
53 |
Low-Beam Headlamps |
54 |
Parking Lamps |
55 |
High-Beam Headlamps |
56 |
Fog Lamps |
57 |
Starter Relay |
58 |
Cooling Fan S/P |
59 |
Powertrain |
60 |
Cooling Fan 2 |
61 |
Cooling Fan 1 |
62 |
Ignition |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
Still have questions or want to supplement the article?
Discuss On
Telegram