The Chevrolet Caprice (1991-1993) has a dependable electrical system that uses fuses and relays to power essential components. The fuse box is located under the dashboard and manages systems like the headlights, power windows, radio, and interior lighting. Each fuse protects specific circuits by interrupting the power flow if there’s an electrical overload, preventing damage to the wiring.
The relays in the Chevrolet Caprice control major functions, such as the starter, cooling fans, and fuel pump. These relays act as switches, allowing smaller electrical currents to control larger systems. If a relay, such as the fuel pump relay, fails, it can cause starting issues or stop the fuel pump from functioning correctly.
Regularly inspecting and maintaining the fuses and relays ensures the Chevrolet Caprice’s electrical system continues to function reliably. A blown fuse or a faulty relay can lead to malfunctions, but timely replacement keeps all critical systems running smoothly.
MUST READ: DYI – How to Check Car Fuses?
(1991-1993) 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 1991-1993 fuse assignment
Year of production: from 1991, 1992, 1993
Fuse box diagram
| No. | A | Circuit Protected |
| 1 | 15 | Underhood Light, Power Antenna, Keyless Entry, Courtesy Lights, Compass/Lighted Mirror, Horn, Lighted Visor, Door Locks, Power Mirrors, Rear Glass Release, Audible Warning System |
| 2 | 15 | Audible Warning System, Cigarette Lighter, Rear Wiper, Glove Box Light, Radio, Trunk Light, Rear Gate Ajar Light, Trunk Release |
| 3 | 10 | ’91: Anti-Lock Brake System |
| 10 | ’92-’93: Bose Amplifier | |
| 4 | 25 | ’91: Bose Radio Amplifier |
| 10 | ’92: Electronic A/C | |
| 10 | ’93 (Sedan): Electronic Level Control | |
| 25 | ’93 (Wagon): Electronic Level Control | |
| 5 | 7.5 | Instrument Panel Lights |
| 6 | 20 | Keyless Entry, Alternator, Heater, Air Conditioner, Daytime Running Lights |
| 7 | 30 | ’91: Electronic A/C Blower Motor |
| 8 | 15 | Wagon: Rear Wiper/Washer |
| 9 | 10 | Radio |
| 10 | 25 | Windshield Wiper/Washer, Washer Fluid Level |
| 11 | 7.5 | Fuel Injectors |
| 12 | 10 | Supplemental Inflatable Restraint |
| 13 | 10 | Speed Signal Module, ECM, EGR Solenoid, Air Control ESC Module, Canister Purge, Cluster Electronics/Warning Indicator |
| 14 | 15 | Twilight Sentinel, Parking, Side Marker & License Lights, Daytime Running Lights |
| 15 | 30 | Rear Window Defogger |
| 16 | 7.5 | Heated Mirrors |
| 17 | 15 | Audible Warning System, TCC Brake Switch, Compass Mirror, Supplemental Inflatable Restraint, Gauges/Warning Indicator, Headlight Switch Illumination, Rear Window Defogger, Fluid Warning, Anti-Lock Brake System, Twilight Sentinel, Daytime Running Lights, Low Oil Module, Park/Neutral Relay, Height Sensor, Power Vent Switch (’91) |
| 18 | 15 | Turn Signal Lights, Back-Up Lights Cruise Control |
| 19 | 20 | Stoplights, Hazard Lights |
| 20 | 5 | ECM, Supplemental Inflatable Restraint |
| Circuit Breaker | ||
| 21 | 30 | Keyless Entry, Power Door Locks, Power Seats, Tailgate Lock Relay, Power Vent Motor (’91) |
| 22 | – | – |
| 23 | 30 | Power Windows |
| 24 | – | – |
| 25 | – | – |
Conclusion
For owners and enthusiasts of classic Chevrolet Caprice 1991-1993, 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.
