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

Main Relay:

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.