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. The circuit breakers allow the component to work for a short time before they trip. This allows for power windows to go up a small amount be for the breaker trips. The headlamps may flash on and off and the circuit breaker heats and cools. This function may allow a vehicle to make it back to the repair shop. Some circuit breakers are built into the various components. Most circuit breakers are located under the instrument panel and in the fuse and relay box in the engine compartment.
Many circuit breaker has a reset button on the top. If pushing the reset button doesn't recover the circuit, repair the short and replace the breaker.