Dashlight Brightness Controller

Controller Input Test

NOTE: The control unit is built into the dashlight brightness controller.

1. Carefully pry the switches out of the dashboard, then disconnect the 3-P connector from the controller.

2. Make the following input tests at the connector terminals.

3. If all tests prove OK, yet the dashlights still cannot be controlled, check the connector for good contact. If OK, replace the controller.

No.	Terminal	Test condition	Test: desired result	Possible cause (if result is not obtained)
1	BLK	Under all conditions.	Check for continuity to ground: there should be continuity.	•   Poor ground (G201, G401). •   An open in the wire.
2	RED/BLK	Combination light switch ON.	Check for voltage to ground: there should be battery voltage.	•   Blown No. 19 (10 A) fuse. •   Faulty combination light switch. •   An open in the wire.
3	RED	Combination light switch ON.	Connect to ground: dashlights should come on full bright.	•   An open in the RED/BLK or RED wire.