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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.
Voltage test.
POSSIBLE PROBLEMS
REASON FOR QUESTION
Relay R5 ground wire faulty.
Wire 7 faulty.
Wire 23 faulty.
Relay R5 faulty.
Engine switch faulty.
Wire 33 faulty.
Wire 32 faulty.
Relay R3 faulty.
Main power switch faulty.
Fuse 1 faulty.
Wire 4 faulty.
This question eliminates a
possible problem or group of
possible problems deter-
mining where troubleshooting
continues.
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.
Engine switch OK.
Wire 33 OK.
Wire 32 OK.
Relay R3 OK.
Main power switch OK.
Fuse 1 OK.
Wire 4 OK.
Continuity test.
STE/ICE-R #91.
POSSIBLE PROBLEMS
REASON FOR QUESTION
Relay RS ground wire faulty.
Wire 7 faulty.
Wire 23 faulty.
Relay R5 faulty.
If continuity is not present,
relay R5 ground wire is faulty.
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