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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.
Relay R5 ground wire OK.
Wire 7 OK.
Wire 23 OK.
Relay R5 OK.
Main power switch OK.
Fuse 1 OK.
Wire 4 OK.
Engine switch OK.
Voltage test.
STE/ICE-R #89.
POSSIBLE PROBLEMS
REASON FOR QUESTION
Wire 33 faulty.
Wire 32 faulty.
Relay R3 faulty.
If 22 to 24 vdc are not
present,
wire 33 is faulty.
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.
Main power switch OK.
Fuse 1 OK.
Wire 4 OK.
Engine switch OK.
Wire 33 OK.
Continuity test.
STE/ICE-R #91.
POSSIBLE PROBLEMS
REASON FOR QUESTION
Wire 32 faulty.
Relay R3 faulty.
If continuity is not present,
wire 32 is faulty. If wire 32 is
OK, relay R3 is faulty.
2-30
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