Main Relay (Computer/Fuel System): Testing and Inspection

Main Relay Inspection:

1. Verify that relay "clicks" when ignition is switched OFF and ON.
2. Unplug relay. Check that there is no continuity across terminals C and D.
3. Apply 12 Volts across terminals A and B.
4. Check that continuity now exists across terminals C and D.
5. If not as specified, replace relay.