The Chevrolet Caprice (1980-1990) has a robust electrical system that relies on fuses and relays to ensure smooth operation. The fuse box, located under the dashboard on the driver’s side, controls essential functions like headlights, taillights, turn signals, radio, and interior lights. Fuses act as safety devices by breaking the circuit in case of an electrical overload, protecting components from damage.
The relays in the Chevrolet Caprice control larger electrical functions, such as the starter motor, cooling fans, and horn. These relays work as electrical switches that allow a smaller current to control a larger one. A faulty relay, such as a starter relay, can cause issues like the engine failing to start.
Maintaining and regularly checking the fuses and relays is essential for the reliable operation of the Chevrolet Caprice’s electrical system. Ensuring these components are functioning properly prevents unexpected electrical failures and ensures the vehicle’s critical systems remain operational.
MUST READ: DYI – How to Check Car Fuses?
(1980-1990) Chevrolet Caprice 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.
Chevrolet Caprice 1980-1990 fuse assignment
Year of production: from 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990
Fuse box diagram
| Fuse | [A] | Protected Component |
| 1 | 5 | Instrument Panel Lights, Alarm Buzzer, Heater Dial Light |
| 2 | 20 | ’80-’89: Choke Heater |
| 2 | 20 | ’90: Alternator |
| 3 | — | — |
| 4 | 30 | Circuit Breaker: Power Windows and Sunroof |
| 5 | 3 | Engine Crank |
| 6 | 25 | Heater and Air Conditioning |
| 7 | 10 | Electronic Control Module |
| 8 | 10 | Ignition Switch Controlled |
| 7,5 | Injectors, Ignition | |
| 9 | 25 | Windshield Wipers and Washer |
| 10 | 20 | Stop Light, Hazard Light |
| 11 | 10 | ’80-’86: Cruise Control, Rear Window Defogger, Gauges, Closed Loop, Warning Lamps, Buzzers, Rear Deck Lid Release, TCC, VSS |
| 10 | ’87-’89: Instrument Panel Gauges | |
| 20 | ’90: Instrument Panel Gauges | |
| 12 | 20 | Parking Lamps, Side Marker Lamps, License Lamps, Tail Lamps, Cornering Lamps |
| 13 | 10 | Radio, Idle Stop Solenoid, Delay Wipers, Cruise Control |
| 14 | 30 | Circuit Breaker: Power Door Locks, Power Seats, Rear Window Defogger, Tailgate Lock |
| 15 | 20 | Back-Up Lamps, Turn Signal Lamps |
| 16 | 20 | Cigarette Lighter, Horn, Key Warning Buzzer, Clock Power Antenna, Dome Light, Reading Light, Courtesy Lamps, Underhood Light, Glove Box Lamp, Rear Compartment Light |
| 17 | — | — |
| 18 | — | — |
| 19 | — | — |
Circuit Breaker:
- Headlights — Circuit breaker is integral with headlight switch to protect headlight circuit.
- Windshield Wiper — Circuit breaker integral with windshield wiper switch to protect wiper circuit.
- Power Seats, Power Windows & Power Door Locks — Circuit breaker is located on fuse panel to protect power accessories.
- Rear Window Defogger – Circuit breaker is located on left side fender inner skirt.
Conclusion
For owners and enthusiasts of classic Chevrolet Caprice 1980-1990, 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 Chevrolet’s craftsmanship and innovation in the automotive industry during that era.
