Operation CHARM: Car repair manuals for everyone.

Headlamp Dimmer Relay: Testing and Inspection

1. Remove the dimmer relay from the under-hood fuse/relay box.

Dimmer Relay Test:




2. Check continuity at the relay terminals.
- There should be continuity between the F and E terminals and between the B and C terminals.
- There should be continuity between the A and C terminals when power and ground are connected to the E and F terminals.
- There should be no continuity between the A and C terminals when power is disconnected.