Dimmer Switch: Service and Repair

Controller Test/Replacement

1. Remove the driver's switch panel.




2. Measure resistance between the No.3 and No.4 terminals while rotating the adjusting dial. Resistance should vary from 0 to 10,000 ohms as the dial is rotated.
3. Turn the CANCEL switch off by rotating the adjusting beyond its end position (until if clicks). There should be no continuity between the No.2 and No.6 terminals.

NOTE: The cancel switch is closed with the adjusting dial between the minimum and maximum positions.

4. If necessary, remove the two screws, and replace the controller.