Main Relay (Computer/Fuel System): Description and Operation

PGM-FI Main Relay:

DESCRIPTION
The Programed Fuel Injection (PGM-FI) Main Relay actually contains two individual Relays. The Relay is located at the left side of the Cowl. One Relay is energized whenever the Ignition is "ON" which supplies the Battery voltage to the Engine Control Module (ECM), power to the Fuel Injectors, and power for the second Relay. The second Relay is energized for two seconds when the Ignition is switched "ON", and when the Engine is running, to supply power to the Fuel Pump.