The Chevrolet Monza (1975-1980) is a compact car known for its versatile design and performance options during its production run. The electrical system of the Monza is a fundamental aspect of its operation, relying on the fuse box and relays to manage and protect various circuits throughout the vehicle.
The fuse box in the Chevrolet Monza is typically located under the dashboard on the driver’s side. It contains a series of fuses that protect different electrical circuits, such as those for the headlights, turn signals, wipers, and interior lighting. Each fuse is designed to blow if an electrical overload or short circuit occurs, effectively preventing damage to the vehicle’s wiring and electrical components.
Relays in the Monza serve as electrically controlled switches that manage high-current circuits, like those for the starter motor, cooling fan, and occasionally the fuel pump, depending on the specific model. By allowing these high-power circuits to be controlled by low-current signals, relays help maintain the vehicle’s safety and electrical efficiency. Regular inspection and replacement of faulty fuses and relays are crucial for ensuring the longevity and reliable performance of this classic Chevrolet model.
MUST READ: DYI – How to Check Car Fuses?
(1975-1980) Chevrolet Monza 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 Monza (1975-1980) fuse assignment
Year of production: from 1975, 1976, 1977, 1978, 1979, 1780
Fuse Box diagram
| No. | A | Circuit Protected |
| 1 | – | – |
| 2 | – | – |
| 3 | 20 | Clock light, dome light, lighter light, glove box light, key warning buzzer |
| 4 | 20 | Tail light, side marker light, license light |
| 5 | 20 | Stop lights and hazard flasher |
| 6 | 4 | Instrument panel, radio, heater, windshield wiper, cigar lighter lights |
| 7 | 25 | Heater and air conditioner |
| 8 | 20 | Turn signals, fuel gauge and temperature gauge, warning lights, seat belt warning, tachometer, backup lights, oil/choke light |
| 9 | 1 | Electric fuel pump |
| 10 | 10 | Radio |
| 11 | 25 | Windshield wiper and washer pump |
| 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 attached to firewall to protect electric motors Fusible Links: Fusible links are located in the engine compartment. Gauge size is marked on insulation and color matches wire being fused. Fusible links should always be four gauge sizes smaller than wire being fused The links are: Molded splice at starter solenoid “BAT” terminal, 14 gauge red wire. A 16 gauge red fusible link is located at junction block to protect all unfused wiring of 12 gauge or larger. The ammeter circuit is protected by 2 red 20 gauge wire links installed as molded splices at the junction block. | ||
Conclusion
For owners and enthusiasts of classic Chevrolet Monza (1975-1980), 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.
