Main Relay
- Ensure main relay clicks when ignition is turned on and off.
- If no sound is heard, unplug relay. Apply 12 volts to terminal A and ground terminal B. See Fig 1 .
- Use ohmmeter to check terminal continuity. Terminals C-D should have continuity with 12 volts applied. There should be no continuity with no voltage applied. If relay does not respond as described, replace the main relay.