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. 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. Fuse 1 OK. Wire 4 OK. Batteries OK. Voltage test. STE/ICE-R #89. POSSIBLE PROBLEMS REASON FOR QUESTION Battery to shunt cable faulty. Wire 2 faulty. If 22 to 24 vdc are not present, cable is faulty.  If cable is OK, wire 2 is faulty. 2-22

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