TM 9-2320-364-20-2 2-1258 12.  TAILLIGHT(S) DO NOT OPERATE (CONT). 2. Replace taillight lamp (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 faulty. Taillight wire 1008 faulty. 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 tail light lamp filament is faulty, the lamp will not light. WARNING 3. Repair wire 1008 (see schematic Fig 2-32). 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 faulty. 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 Voltage test. STE/ICE-R #89. If wire 1008 is loose, faulty, or shorted to ground, taillight will not operate. WARNING Is taillight lamp free from damage? Are 10 to 14 vdc measured at taillight end of wire 1008? Read   WARNING on Page 2-1259 Read   WARNING on Page 2-1259