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

The main relay is turned ON and OFF by turning the ignition switch ON and OFF. The power for the entire EFI system is turned ON and OFF by turning the main relay ON and OFF. The same part is used for main relay and fuel pump relay. Between the two relays installed to the bracket, the one used for the main relay is not specified. Therefore, identify it by color of lead wire (Black/White, White/Blue, White/Green).