GM S10/S15/Sonoma Pick-Ups 1982-1993 Repair Manual

Circuit Breakers


One device used to protect electrical components from burning out due to excessive current is a circuit breaker. Circuit breakers open and close the flow path for the electricity rapidly in order to protect the circuit if current is excessive. A circuit breaker is used on components which are more likely to draw excessive current such as a breaker often found in the light switch that protects the headlight circuit. Circuit breakers may be found in various locations on the vehicle including on/in the protected component, on a firewall bracket, the convenience center and/or the fuse block.