1984 Ford LN600 Starter Relays

The Starter Solenoid is the relay of the starting circuit that carries the high amperage required when the starter motor is engaged. The solenoid is typically energized by the starter switch when commanded by the vehicle operator. Starter solenoids may also be used in other high amperage circuits, compare solenoid specification to your circuit needs before installing.

Relays are electrical switches used to convert a small electrical load into a circuit capable of handling a high amperage load. Computers and small switches are not designed to carry the higher amperage requirement of a circuit that may have an electric motor, solenoid, or high amperage lighting fixture. Within a relay are contacts that are controlled with electromagnetism, when the circuit switch commands the device on or off, magnetism will pull or release the contact arm closing or opening the contacts within the relay that carry the voltage.