Courtesy/Dome Lamps Inoperative With Headlamp Switch

Test 1 - 3:

Test 4 - 8:

SYMPTOM
COURTESY/DOME LAMPS INOPERATIVE WITH HEADLAMP SWITCH

POSSIBLE CAUSES
- Courtesy Lamp Switch output circuit open
- Courtesy Lamp Driver circuit open (to lamps)
- Fuse open test
- Fused B+ circuit open
- All Courtesy/Dome lamp bulbs open
- Ground circuit open
- CTM-Courtesy Lamp Driver Circuit open
- Headlamp switch- open Courtesy Lamp Driver