A fuse is a protective device installed in an electrical circuit to prevent damage to the other components in the circuit from excessive voltage or current.
Fuses achieve this protection by interrupting current flow when the excessive energy melts or burns away the conductive material held between the fuse’s two terminals. Once a fuse has opened (blown) it must be replaced in order for the circuit to receive power again.
Cause and Diagnosis
Vehicle Specific Fuse Box & PDC