The Cadillac Seville from 1980 to 1985 was a luxury sedan known for its elegance, comfort, and innovative features of its time. Its electrical system, which included the fuse box and relay components, played a crucial role in the vehicle’s overall functionality.
During this era, the fuse box in the Cadillac Seville housed fuses that protected various electrical circuits throughout the vehicle. These circuits powered essential components such as the engine control module, lighting systems, climate control, and more. Fuses were designed to prevent electrical overload by breaking the circuit if necessary.
Relays in the Cadillac Seville functioned as electrically operated switches that controlled high-current circuits. They facilitated the precise activation and deactivation of functions like the starter motor, fuel pump, air conditioning compressor, and power windows or seats. These relays helped manage power distribution efficiently, ensuring reliable operation of the vehicle’s electrical components.
Regular inspection and maintenance of the fuse box and relays were crucial to ensure the Cadillac Seville maintained optimal performance. This included checking fuses for signs of wear or damage, ensuring relay connections were secure, and promptly addressing any electrical issues. Proper care of these components was essential for maintaining the vehicle’s electrical integrity and ensuring a comfortable driving experience in the Cadillac Seville 1980-1985.
MUST READ: DYI – How to Check Car Fuses?
(1980-1985) Cadillac Seville fuse box and relay with Diagram
WARNING
- Never replace a fuse with one that has a higher amperage rating.
- A fuse with a too-high amperage could damage the electrical part and cause a fire.
- On no account should fuses be repaired (e.g. patched up with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause a fire.
- If a fuse blows repeatedly, do not keep replacing it. Instead, have the cause for the repeated short circuit or overload tracked and fixed.
- Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
Cadillac Seville 1980-1985 fuse assignment
- Cigar lighter / power outlet fuses in the Cadillac Seville are the fuse №. 23 in the Engine compartment fuse box and fuses №. 58 and 65 in the Rear Underseat fuse box.
Year of production: 1980, 1981, 1982, 1983, 1984, 1985
Fuse box diagram
| Fuse | [A] | Protected Component |
| 1 | 10A | Front side marker, cornering and ash tray lights |
| 2 | 3A | Cruise control and DFI brake switch |
| 3 | 5A | Rheostat controlled instrument panel lights |
| 4 | — | — |
| 5 | 10A | Back-up lights, diesel fast idle, diesel controller |
| 6 | 20A | Air conditioning compressor feed, ECC programmer and power module, rear defogger relay coil and generator indicator |
| 7 | 10A | Antenna motor feed |
| 8 | 20A | Turn signal lights |
| 9 | 25A | Opera, license, tail and rear side marker lights |
| 10 | 20A | Stop light switch, hazard warning flasher and ECC control head |
| 11 | 20A | Fuel gauge, oil pressure and coolant temperature indicator, low brake fluid indicator, seat belt warning chime and indicator and electronic level control compressor |
| 12 | 20A | Key warning buzzer, coolant temperature indicator, instrument panel courtesy and compartment lights and cigar lighter |
| 13 | — | — |
| 14 | — | — |
| 15 | 10A | Radio and antenna relay coil |
| 16 | — | — |
| 17 | 20A | Body courtesy and ash tray lights, electronic level control height sensor |
| 18 | 25A | Windshield wipers and low washer fluid indicator |
| 19 | 25A | Rear window defogger |
| Fuse | [A] | Protected Component |
| 1 | 3A | Fuel injector |
| 2 | 3A | Fuel injector |
| 3 | 3A | Fuel pump cranking circuit |
| 4 | 20A | ECS battery |
| 5 | 10A | MDA ignition |
| 6 | 10A | Fuel pump |
| 7 | 15A | ECS ignition |
| 8 | — | — |
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.
Fusible Link:
All models are equipped with fusible links which attach to lower ends of main feed wires at junction block, or at starter solenoid. Gauge size is marked on insulation and each link is four sizes smaller than the cable it is designed to protect. The same size wire with special hypalon insulation must be used when replacing a fusible link.
In-Line Fuse:
- Vanity Mirror — 2 amp. fuse located behind mirror.
- 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.
Conclusion
For owners and enthusiasts of classic Cadillac Seville 1980-1985, understanding the fuse box and relay systems is essential for vehicle maintenance. Regular inspection and maintenance of these components helped ensure the vehicle’s longevity and reliability, preserving its status as a symbol of Cadillac’s craftsmanship and innovation in the automotive industry during that era.
