Operation CHARM: Car repair manuals for everyone.

Dash Lights Brightness Controller

Controller Test

1. Remove the instrument panel.
2. Remove the switch (A) from the instrument fascia.






3. Measure the resistance between the No. 4 and No. 5 terminals while rotating the adjusting dial. The resistance should vary from 0 to 20 kohms as the dial is rotated.
4. Check for continuity between the No. 3 and No. 6 terminals with the dial rotated to CANCEL position. There should be no continuity.
5. If necessary, check the illumination bulb (B).