TM 9-2320-364-20-4 2-3106 2.  INTERFACE KIT HYDRAULICS INOPERATIVE (CONT). KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Verify repair. YES NO Faulty not corrected. Notify DS Maintenance. 21. Does interface operate? Fault corrected. If interface operates, fault has been corrected. Hydraulic selector switch is in   CRANE/SRW mode. LHS operates when nothing is   connected to interface quick   disconnect and hydraulic   selector switch is in AUTO or   MAN mode. Batteries OK. EMM module hooked up to truck   interface kit. Circuit breaker CB29 not tripped. Hoses and tubes OK. Quick disconnect OK. LED #3 lamp illuminated. LED #1 lamp illuminated. Auxiliary supply valve OK. Jumper wire in S4 connector   terminals 1 and 5 OK. Wire 1731 from connector S4   terminal 1 to connector MC29   terminal D OK. Wire 1731 from connector MC29   terminal D to connector MC135   terminal A OK. Wire 1731 from connector   MC135 terminal A to relay R36   terminal 86 OK. LED #3 lamp OK. Wire 1435 from relay R36   terminal 85 to rectifier terminal   AC OK. Rectifier OK. Wire 1435A from connector   MC135 terminal H to connector   MC131 terminal A OK. Circuit breaker CB29 OK. Wire 1789 from circuit breaker   CB29 to relay R36 terminal 30   OK. Relay R36 OK. Wire 1792 from relay R36   terminal 87 to LED #1 lamp OK. LED #1 lamp OK. Wire 1792 from LED #1 lamp to   connector MC135 terminal F   and to connector MC134   terminal 1 OK. Wire 1435B from LED #1 lamp   to connector MC134 terminal 2   and to connector MC131   terminal C OK.