Courtesy Lamps Inoperative From Liftgate Flip-Up Glass Only

Test 1 - 5:

SYMPTOM
COURTESY LAMPS INOPERATIVE FROM LIFTGATE FLIP-UP GLASS ONLY

POSSIBLE CAUSES
- Open ground wire
- Open liftgate ajar switch sense
- BCM flip-up ajar switch open
- Open liftgate flip-up ajar switch