Dash Lights Brightness Controller

Controller Input Test

'00-03 models

1. Remove the gauge assembly.
2. Inspect the gauge assembly connector B (12P) terminals to be sure they are all making good contact.
- If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, go to step 3.






3. Reconnect the connectors to the gauge assembly.
4. Back probe the connector and make these input tests.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the controller switch board or the main printed circuit board in the gauge assembly must be faulty; replace it.






'04-08 models

1. Remove the gauge assembly.
2. Inspect the gauge assembly connector A (22P) terminals to be sure they are all making good contact.
- If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, go to step 3.






3. Reconnect the connectors to the gauge assembly.
4. Back probe the connector and make these input tests.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the controller switch board or the main printed circuit board in the gauge assembly must be faulty; replace it.