Buick Electra (V; 1977 – 1984) – fuse and relay box diagram
Year of production: 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984
This article covers the Buick Century. It includes fuse box diagrams for the 5th generation 1977, 1978, 1979, 1980, 1981, 1982, 1983 and 1984 models, provides details on the location of the fuse panels inside the vehicle, and explains the function and layout of each fuse.
Passenger compartment
Fuse box diagram

Assignment of the fuses in the fuse box
Fuse | [A] | Protected Component |
1 | 5 | Instrument illumination, headlight warning and electronic air conditioning |
2 | 20 | Electric choke |
3 | 5 | Instrument illumination, headlight warning |
4 | 30 | Circuit breaker: Power windows and roof, fuel cap lock release |
5 | — | — |
6 | 25 | Heater, air conditioning, trunk lid release, radio capacitor |
7 | 10 | Electronic Control Module |
8 | 10 | Diesel engine fuse |
9 | 25 | Windshield wiper and washer |
10 | 20 | Hazard and stop lights |
11 | 20 | Seat belt light and buzzer, trunk ajar, transmission downshift and C-4 or E.S.C. jumper, heated back light relay, map and fuel economy lights, instrument gauges and indicator lights |
12 | 20 | Tail, side marker, parking and license lights, clock radio |
13 | 10 | Radio, cruise control |
14 | 30 | Circuit breaker: Power seats, door locks, heated rear window feed, tailgate window |
15 | 20 | Turn signal and back-up lights |
16 | 20 | Cigar lighter, glove box light, speed and key warning buzzer, power antenna, clock radio, clock, pulse wiper, air conditioning |
17 | 20 | Dome and sail panel lights, trunk light, reading light, vanity light, headlight on warning, automatic door locks and rear cigar lighter, tailgate ajar |
18 | — | — |
19 | 10 | Instrument gauges, indicator lights, transmission converter clutch and cruise control, Electric choke |
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.