Cadillac Eldorado (1979 – 1981) – fuse and realy box diagram
Year of production: 1979, 1980, 1981
This article covers the Cadillac Eldorado, produced from 1953 to 2002. The Cadillac Eldorado was one of the longest-produced luxury coupé models in the history of American automotive manufacturing.
Inside, you’ll find fuse box diagrams for the 1979 through 1981 models, along with details on the location of the fuse panels within the vehicle and information on the function and layout of each fuse and relay.
Fuse box diagram
Assignment of the fuses in the fuse box
| Fuse | [A] | Protected Component |
| 1 | 3 | Fuel injector |
| 2 | 3 | Fuel injector |
| 3 | 3 | Fuel pump cranking circuit |
| 4 | 20 | ECS battery |
| 5 | 10 | MDA ignition |
| 6 | 10 | Fuel pump |
| 7 | 15 | ECS ignition |
| 8 | — | — |
Assignment of the fuses in the fuse box
| Fuse | [A] | Protected Component |
| 1 | 10 | Cornering, side marker, opera, right door ash tray, instrument panel ash tray lights |
| 2 | 3 | Cruise control, DFI brake switch |
| 3 | 5 | Rheostat controlled instrument panel lights |
| 4 | — | — |
| 5 | 10 | Back-up lights, diesel fast idle, diesel controller |
| 6 | 20 | Air conditioning compressor feed, ECC programmer and power module, rear defogger relay coil, generator indicator |
| 7 | 10 | Antenna motor feed |
| 8 | 8 | Turn signal lights |
| 9 | 25 | Opera, license, tail and rear side marker lights |
| 10 | 20 | Stop light switch, hazard warning flasher, ECC control head |
| 11 | 20 | Fuel gauge, oil pressure and coolant temperature indicator, low brake fluid indicator, seat belt warning chime and indicator, electronic level control compressor, downshift switch |
| 12 | 20 | Key warning buzzer, coolant temperature indicator, instrument panel courtesy and compartment lights, cigar lighter, engine telltale light, glove box light |
| 13 | 25 | Automatic Temperature Control blower |
| 14 | — | — |
| 15 | 10 | Radio, antenna relay coil |
| 16 | 20 | Electronic fuel injection (’79) |
| 17 | 20 | Body courtesy lights, cigar lighters, level control height sensor, ash tray lights |
| 18 | 25 | Windshield wipers and low washer fluid indicator |
| 19 | 25 | Rear window defogger |
Circuit Breaker:
- Headlights (Twilight Sentinel) — Integral with headlight switch.
- Windshield Wiper — Integral with windshield wiper switch.
- Rear Defogger — Circuit breaker located on lower steering column cover reinforcement.
- Sunroof — 25 amp. On body bracket at upper right corner of fuse block
Fusible Link:
- Accessories & Body Feed — 16 gauge fusible link located in black/red stripe wire at starter
- Ignition — 16 gauge fusible link located in red wire at starter solenoid
- Headlights — 18 gauge fusible link located in yellow wire at starter
- Charging — 16 gauge fusible link located in red/white stripe wire at junction block
- Fuel Injection Electronic Control Unit – 18 gauge fusible link located in dark green wire on “BAT” terminal of alternator (’79).
In-Line Fuse:
- Vanity Mirror — 2 amp. fuse located behind mirror
- EFI Fuel Pump — 10 amp. fuse located left of fuel injection electronic control unit brown wire (’79)
- Theft Deterrent — One 20 amp. fuse for lights, and one 25 amp. fuse for horn is located above radio in instrument panel.
- Trunk Lid Pull Down — One 20 amp. fuse is located behind right hand fabric rear end panel inside trunk.
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.