A blown fuse or tripped circuit breaker is your vehicle's first line of defense against an electrical short — and often the simplest, cheapest fix for a component that suddenly stops working. These devices protect wiring and electronics by cutting power the instant current spikes too high, preventing a small short from turning into a melted harness or an electrical fire. Browse fuses, fuse blocks, and resettable circuit breakers for cars, trucks, and SUVs to get dead circuits back up safely.