GM Full-Size Trucks 1970-1979 Repair Guide

Circuit Breakers


A circuit breaker is an electrical switch which breaks the circuit in case of an overload. All models have a circuit breaker in the headlight switch to protect the headlight and parking light systems. An overload may cause the lamps to flicker or flash on and off, or in some cases, to remain off. 1974 and later windshield wiper motors are protected by a circuit breaker at the motor.