Share this

Buick Century (2002 - 2003) - 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:  2002, 2003

Instrument Panel Fuse Block

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

Buick Century - fuse box - instrument panel

Circuit Breakers Usage
TIRE RESET Tire Inflation Monitor Reset Button
PWR/WNDW PWR S/ROOF Power Windows, Power Sunroof
R/DEFOG Rear Window Defogger
PWR/ SEAT Power Seat
Blank Not Used


Fuses Usage
PRK/LCK Ignition Key Solenoid
Blank Not Used
Blank Not Used
PCM, BCM, U/H 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
INT/ILLUM Panel Dimming
Blank Not Used
IGN 0: CLSTR,  CM & 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 Retained Accessory Power
TAIL LAMPS, LIC LAMPS Taillamps, License Plate Lamps
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
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, and Air Conditioning Control Head
BTSI PARK LOCK Shifter Lock Solenoid
BCM PWR Body Control Module
HAZARD Hazard Warning Flashers
LH HEATED SEAT Driver’s Heated Seat
Blank Not Used
BCM ACCY Ignition Signal: Hot in ACCESSORY 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, HVAC 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 Century - fuse box - engine compartment

Maxi Fuses USage
2 Starter Solenoid
3 Power Seats, Rear Defog, 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 Retained Accessory Power, Keyless Entry, Data Link, Heating Ventilation Air Conditioning Head, Cluster, Radio, Auxiliary Power (Power Drop), 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 Not used
15 Not Used
16 Horn
17 Fog Lamps
18 Not Used
19 Fuel Pump


Micro Relays Usage
15 A/C Clutch
16 Horn
17 Not Used
18 Not Used
19 Fuel Pump


Mini Fuses Usage
20 Not Used
21 Generator
22 ECM
23 A/C Compressor Clutch
24 Cooling Fan
25 Electronic Ignition
26 Transaxle


Mini Relay Usage
27 Horn
28 Fuel Injector
29 Oxygen Sensor
30 Engine Emissions
31 Not Used
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 Spare
 SYMBOL Air Conditioner Compressor Clutch Diode

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

Access the private club

Become a member of and get access to our private telegram bot. Accelerated access and smart search of fuse box & wiring diagrams.
P.S. We never spam!

May Be Useful