TM 9-2320-364-20-2 2-1260 12.  TAILLIGHT(S) DO NOT OPERATE (CONT). 4. Repair wire 1435 (see schematic Fig 2-33) or notify DS Maintenance. Verify repair, go to Step 8 of this Fault. YES NO Headlights operate indicating   10 to 14 vdc to headlight   switch. Taillight lamp OK. Taillight wire 1008 OK. Wire 1435 faulty. Rear composite light faulty. Wire 1292 faulty at splice to   headlight switch. Headlight switch faulty. Wire 1008 faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Continuity test. STE/ICE-R #91. If rear composite light housing is not grounded, taillight will not operate. WARNING 5. Replace rear composite light (Para 7-47). Verify repair, go to Step 8 of this Fault. YES NO Headlights operate indicating   10 to 14 vdc to headlight   switch. Taillight lamp OK. Taillight wire 1008 OK. Wire 1435 OK. Rear composite light faulty. Wire 1292 faulty at splice to   headlight switch. Headlight switch faulty. Wire 1008 faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Continuity test. STE/ICE-R #91. If the taillight socket is faulty or corroded, taillight will not operate. WARNING Is continuity measured on wire 1435 between wire and a known good ground? Is continuity measured between composite socket ground and a known good ground? Read   WARNING on Page 2-1261 Read   WARNING on Page 2-1261