B1581 - Dimmer Decrease Circuit Short To Battery

B1581 - Dimmer Increase Circuit Short To Battery

B1581-1 - Check Headlamp Switch

- Disconnect headlamp switch connector.
- Using a voltmeter, measure pin 4, circuit 1035 (O/R) for voltage

Is voltage B+?

YES GO to B1581-2.
NO REPLACE headlamp switch. RESTORE vehicle. RETEST system.


B1581-2 - Check Circuit 1035 (O/R)

- Disconnect lighting control module C2 connector.
- Using a voltmeter, measure headlamp switch connector pin 4, circuit 1035 (O/R) for voltage.

Is voltage B+?

YES SERVICE circuit 1035 (O/R) for short to B+. RETEST system.
NO REPLACE lighting control module. RESTORE vehicle. RETEST system.