Courtesy Lamp Inoperative From Both Doors

Test 1 - 3:

Test 4 - 8:

Test 9:

SYMPTOM
COURTESY LAMP INOPERATIVE FROM BOTH DOORS

POSSIBLE CAUSES
- No response(BCM)/CCD bus failure
- Fused B(+) circuit open
- Courtesy lamp driver circuit open
- Courtesy lamp relay control circuit open
- Courtesy lamps ground circuit open
- Courtesy light relay defective ( open)
- BCM defective (relay control function)by default
- BCM defective(LF door ajar switch status)