TM 9-2320-364-20-2 2-1262 12.  TAILLIGHT(S) DO NOT OPERATE (CONT). Headlights operate indicating   10 to 14 vdc to headlight   switch. Taillight lamp OK. Taillight wire 1008 OK. Wire 1435 OK. Rear composite light OK. Wire 1292 OK 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 continuity is not measured, headlight switch is faulty. If continuity is measured, wire 1008 is faulty. YES NO Replace headlight switch (Para 7-27). Verify repair, go to Step 8 of this Fault. 7. Is continuity measured between terminals 2 and 6 on headlight switch? Repair wire 1008 (see schematic Fig 2-31) or notify DS Maintenance. Verify repair, go to Step 8 of this Fault. 6. Repair wire 1292 (see schematic Fig 2-31) 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 OK. Rear composite light OK. 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 1292 is loose, faulty, or shorted to ground, taillights will not operate. WARNING WARNING Are 10 to 14 vdc measured on wire 1292 at headlight switch connector, terminal 2? Read   WARNING on Page 2-1263 Read   WARNING on Page 2-1263