Courtesy Lamps Inoperative With Dome Lamp Switch

Tests 1 - 4:

SYMPTOM
COURTESY LAMPS INOPERATIVE W/DOME LAMP SWITCH

POSSIBLE CAUSES
- Courtesy lamp switch sense circuit open
- Headlamp switch defective - courtesy lamp function open
- BCM defective (courtesy lamp switch sense) by default
- BCM defective - dome lamp switch function