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

Main Relay Testing:

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