TM 9-2320-364-20-2 2-1332 20.  REVERSE LIGHT DOES NOT OPERATE (CONT). 5. Repair wire 1871 (see schematic Fig 2-33) or notify DS Maintenance.   Verify repair, go to Step 9 of this Fault. YES NO Work lights operate indicating   10 to 14 vdc to circuit   breaker CB3. Circuit breakers CB3 and CB4   OK. Engine starts indicating 10 to 14   vdc to wire 1871. Reverse light backup lamp OK. Wire 1435 OK. Wire 1891 OK. Wire 1871 faulty. Wire 214 faulty. Wire 1149 faulty. ATEC ECU faulty. Reverse relay R10 faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Voltage test. STE/ICE-R #89. If wire 1871 is loose, faulty, or shorted to ground, reverse light will not operate. WARNING 6. Repair wire 214 (see schematic Fig 2-33) or notify DS Maintenance.   Verify repair, go to Step 9 of this Fault. YES NO Work lights operate indicating   10 to 14 vdc to circuit breaker   CB3. Circuit breakers CB3 and CB4   OK. Engine starts indicating 10 to 14   vdc to wire 1871. Reverse light backup lamp OK. Wire 1435 OK. Wire 1891 OK. Wire 1871 OK. Wire 214 faulty. Wire 1149 faulty. ATEC ECU faulty. Reverse relay R10 faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Continuity test. STE/ICE-R #91. If there is no continuity, wire 214 is faulty. WARNING Are 10 to 14 vdc measured on wire 1871 at reverse relay R10, terminal 86? Is continuity measured on wire 214 between terminal 86 on relay R10 and harness connector MC9, terminal 2D? Read WARNING on Page 2-1333 Read WARNING on Page 2-1333