Buick Century (IV; 1978 – 1981) – fuse and relay box diagram

Year of production: 1978, 1979, 1980, 1981

 

This article covers the Buick Century. It includes fuse box diagrams for the 1978, 1979, 1980 and 1981 models, provides details on the location of the fuse panels inside the vehicle, and explains the function and layout of each fuse.

 

Fuse box diagram

 

Assignment of the fuses in the fuse box diagram

Fuse	[A]	Protected Component
1	5	Instrument illumination and headlight warning
2	20	Electric choke (V6), closed loop
3	—	—
4	30	Circuit breaker: Power windows and roof
5	—	—
6	25	Heater, air conditioning, pulse wipers and deck lid
7	10	Electronic Control Module
8	—	—
9	25	Windshield wiper and washer
10	20	Hazard and stop lights
11	20	Seat belt light and buzzer, heated back light relay, tailgate window release, map light and fuel economy light
12	20	Tail, side marker, parking and license lights, clock radio
13	10	Radio
14	30	Circuit breaker: Power seats, door locks and heated back light
15	20	Turn signal and back-up lights
16	20	Clock, cigar lighter, glove box light, key buzzer, power antenna, clock radio, radio capacitor, dome and sail panel lights, trunk light, reading light, headlight on warning and door locks
17	—	—
18	—	—
19	10	Gauges, cruise control, torque converter clutch and indicator light
Circuit Breaker: Headlight Circuit — A thermo circuit breaker is incorporated in the headlight switch assembly to protect headlight circuits. Windshield Wiper — Integral with windshield wiper motor.

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.