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Buick Regal (2000) - fuse box diagram

avatar 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: 2000

Instrument Panel Fuse Block

Some fuses are located in a fuse block on the passenger’s side of the instrument panel.

Buick Regal mk4 - fuse box - 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
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
Blank Not Used
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
DRL Daytime Running Lamps Module
INADV POWER BUS Interior Lamps, Retained Accessory Power
Blank Not Used
TAIL LAMPS, LIC LAMPS Taillamps, License Lamps
HEATED MIRROR Heated Mirrors
CRUISE Cruise Control
Blank Not Used
CLUSTER Instrument Panel Cluster
CIGAR LTR, DATA LINK Cigarette Lighter, Auxiliary Power Connection (Power Drop), Data Link
STOP LAMPS Stoplamps
Blank Not Used
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, HVAC Control Head
BTSI PARK LOCK Shifter Lock Solenoid
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
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
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.

Buick Regal mk4 - fuse box - engine compartment

Maxi Fuses Usage
2 Starter Solenoid
3 Power Seats, Rear Window Defogger, Heated Seats
4 High Blower, Hazard Flasher, Stoplamps, Power Mirror, Door Locks
5 Ignition Switch, BTSI, Stoplamps, ABS, Turn Signals, Cluster, Air Bag, DRL Module
6 Cooling Fan
7 Interior Lamps, Retained Accessory Power, Keyless Entry, CEL TEL, Data Link, HVAC Head, Cluster, Radio, AUX Power (Power Drop), Cigarette Lighter
8  Ignition Switch, Wipers, Radio, Steering Wheel Controls, Body Control Module, AUX Power (Power Drop), Power Windows, Sunroof, HVAC Controls, DRL, 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 A/C Clutch
16 Horn
17 Fog Lamps
18 Fuel Pump, Speed Control (L67 only)
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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