TM 10-3930-669-20 1.  ENGINE FAILS TO CRANK (CONT). KNOWN INFO TEST OPTIONS Shunt to starter cable OK. Starter ground cable OK. Starter OK. Batteries OK. Battery to shunt cable OK. Wire 2 OK. Relay R5 ground wire OK. Wire 7 OK. Wire 23 OK. Relay R5 OK. Engine switch OK. Wire 33 OK. Wire 32 OK. Relay R3 OK. Main power switch OK. Continuity test. STE/ICE-R #91. POSSIBLE PROBLEMS REASON FOR QUESTION Fuse 1 faulty. Wire 4 faulty. If continuity is not present, fuse 1 is faulty.  If fuse 1 is OK, wire 4 is faulty. 2-34

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