Courtesy Lamps Inoperative With All Doors & Headlamp Switch

Test 1 - 3:

Test 4 - 6:

SYMPTOM
COURTESY LAMPS INOPERATIVE WITH ALL DOORS & 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
- CTM-courtesy Lamp Driver circuit open