Test I: The Interior Lamps Are Inoperative From The Headlamp Switch

PINPOINT TEST I: THE INTERIOR LAMPS ARE INOPERATIVE FROM THE HEADLAMP SWITCH

I1-I2:

I3-I4:

Normal Operation
The lighting control module (LCM) monitors the headlamp switch status on circuit 1034 (BK/WH) to determine if the courtesy lamps are requested. Based on the headlamp switch status, the LCM energizes the interior lamps through circuit 53 (BK/LB).

Possible Causes
- Circuit 57 (BK) open
- Circuit 1034 (BK/WH) open
- Headlamp switch
- LCM