Courtesy Lamps Inoperative With All Doors & Headlamp Switch

Test 1 - 3:

Test 4 - 9:

Test 10:

SYMPTOM
COURTESY LAMPS INOPERATIVE WITH ALL DOORS & HEAD LAMP SWITCH

POSSIBLE CAUSES
- Courtesy lamp driver CKT open between headlamp switch and CTM
- Open fuse #12
- Bulbs defective
- Headlamp switch - courtesy lamp driver CKT open
- Open fused B(+)
- Open courtesy lamp driver CKT between J-block and splice
- Courtesy lamp driver CKT open between headlamp switch and J-block
- CTM - open courtesy lamp driver
- Junction block open