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
Some fuses are located in a fuse block on the passenger’s side of the instrument panel.
Circuit Breakers | Usage |
TIRE RESET | Tire Inflation Monitor Reset Button |
PWR WINDOWS, PWR SUNROOF | Power Windows, Power Sunroof |
REAR DEFOG | Rear Window Defogger |
POWER SEATS | Power Seat |
Blank | Not Used |
Fuses | Usage |
PARK LOCK | Ignition Key Solenoid |
Blank | Not Used |
Blank | Not Used |
PCM, BCM, U/H RELAY | Ignition Signal: Hot in Run and Start, Powertrain Control Module, Body Control Module, Underhood Relay |
RADIO PREM. SOUND | Remote Radio Premium Sound |
POWER MIRRORS | Power Mirrors |
Blank | Not Used |
PANEL DIMMING | Panel Dimming |
Blank | Not Used |
IGN 0, CLUSTER, PCM, BCM | Ignition Signal: Hot in Run, Unlock and Start, Cluster, Powertrain Control Module, Body Control Module |
Blank | Not Used |
Blank | Not Used |
Blank | Not Used |
INADV POWER BUS | |
DOOR LOCKS | Door Locks |
TRAP ALERT | Trap Alert |
TAIL LAMPS, LIC LAMPS | Taillamps, License Lamps |
RADIO | Radio |
HEATED MIRROR | Heated Mirrors |
CRUISE | Cruise Control |
Blank | Not Used |
CLUSTER | Instrument Panel Cluster |
CIGAR LTR | Cigarette Lighter, Auxiliary Power Connection (Power Drop) |
STOP LAMPS | Stoplamps |
ONSTAR | OnStar |
FRT PARK LPS | Parking Lamps |
POWER DROP | Auxiliary Power Connection (Power Drop): Hot in ACC and Run |
CRANK SIGNAL, BCM, CLUSTER | Crank Signal, Body Control Module, Cluster, Powertrain Control Module |
HVAC | Ignition Signal, Heating Ventilation Air Conditioning Control Head |
BTSI PARK LOCK | Shifter Lock Solenoid |
AIR BAG | Air Bag |
BCM PWR | Body Control Module |
HAZARD | Hazard Flashers |
LH HEATED SEAT | Driver’s Heated Seat |
Blank | Not Used |
BCM ACC | Ignition Signal: Hot in ACC and Run, Body Control Module |
Blank | Not Used |
LOW BLOWER | Low Blower |
ABS | Anti-Lock Brakes |
TURN SIGNALS, CORN LPS | Turn Signals, Cornering Lamps |
RADIO, HVAC, RFA, CLUSTER | Radio, Heating Ventilation Air Conditioning Head, Remote Keyless Entry, Cluster |
HIGH BLOWER | High Blower |
RH HEATED SEAT | Passenger’s Heated Seat |
STRG WHL CONT | Audio Steering Wheel Controls |
WIPER | Wipers |
Underhood Fuse Block
Some fuses and relays are located in the underhood fuse block on the passenger’s side of the vehicle in the engine compartment.
Maxi Fuses | Usage |
1 | Anti-Lock Brake System |
2 | Starter Solenoid |
3 | Power Seats, Rear Window Defogger, Heated Seats |
4 | High Blower, Hazard Flasher, Stoplamps, Power Mirror, Door Locks |
5 | Ignition Switch, BTS Shifter Lock Solenoid, Stoplamps, Anti-Lock Brake System, Turn Signals, Cluster, Air Bag, Daytime Running Lamps Module |
6 | Cooling Fan |
7 | Retained Accessory Power (RAP), Remote Keyless Entry, Data Link, Heating, Ventilation and Air Conditioning Head, Cluster, Radio, Cigarette Lighter |
8 | Ignition Switch, Wipers, Radio, Steering Wheel Controls, Body Control Module, Auxiliary Power (Power Drop), Power Windows, Sunroof, Heating Ventilation Air Conditioning Controls, Daytime Running Lamps, Rear Defog Relay |
Mini Relays | Usage |
9 | Cooling Fan 2 |
10 | Cooling Fan 3 |
11 | Starter Solenoid |
12 | Cooling Fan 1 |
13 | Ignition Main |
14 | Air Pump (Optional) |
15 | Not Used |
16 | Horn |
17 | Fog Lamps |
18 | Not Used |
19 | Fuel Pump |
Mini Fuses | Usage |
20 | Air Pump (Optional) |
21 | Generator |
22 | ECM |
23 | A/C Compressor Clutch |
24 | Cooling Fan |
25 | Electronic Ignition |
26 | Transaxle |
27 | Horn |
28 | Fuel Injector |
29 | Oxygen Sensor |
30 | Engine Emissions |
31 | Fog Lamps |
32 | Headlamp (Right) |
33 | Rear Compartment Release |
34 | Parking Lamps |
35 | Fuel Pump |
36 | Headlamp (Left) |
37 | Spare |
38 | Spare |
39 | Spare |
40 | Spare |
41 | Spare |
42 | Spare |
43 | Fuse Puller |
SYMBOL | 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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