TM 9-2320-364-20-2 2-1212 8.  DOME LIGHT DOES NOT OPERATE (CONT). Headlights operate, indicating   10 to 14 vdc input from   BLACKOUT LIGHTS selector. Dome light lamp OK. Wire 1153 OK. Dome light wire 1435 OK. Wire 1189 OK. Dome light switch faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Continuity test. STE/ICE-R #91. If dome light switch is loose, faulty, or shorted to ground, dome light will not operate. YES NO Replace dome light switch (Para 7-27). 5. Is continuity measured between terminals 1 and 5 on dome light switch? Repair wire 1153 (see schematic Fig 2-29) or notify DS Maintenance.   Verify repair, go to Step 6 of this Fault. 4. Repair wire 1189 (see schematic Fig 2-29) or notify DS Maintenance.   Verify repair, go to Step 6 of this Fault. YES NO Headlights operate, indicating   10 to 14 vdc input from   BLACKOUT LIGHTS selector. Dome light lamp OK. Wire 1153 OK. Dome light wire 1435 OK. Wire 1189 between BLACKOUT   LIGHTS selector and   dome light switch faulty. Dome light switch faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Voltage test. STE/ICE-R #89. If wire 1189 is loose, faulty, or shorted to ground, dome light will not operate. WARNING Are 10 to 14 vdc measured on wire 1189 at dome light switch, terminal 5? Read   WARNING on Page 2-1213