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Page Title: ENGINE FAILS TO CRANK WHEN STARTER IS ENGAGED WARNING (cont)
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TM 5-2420-222-20-1
ORGANIZATIONAL TROUBLESHOOTING CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE FAILS TO CRANK WHEN STARTER IS ENGAGED CONTINUED
WARNING
Although ignition lock switch must be on and battery ground cable connected to test
electrical circuit voltage, turn off ignition lock switch and disconnect battery ground
cable before doing resistance tests or replacing parts. This will keep you from getting
shocked and prevent damage to parts and equipment.
Step 6.
Check battery ground cable terminal (1) for loose, corroded, frayed, or broken connection.
a. If connection at terminal (1) is not loose, corroded, frayed or broken, go to step 7.
b. If connection at terminal (1) is loose, tighten screw (2) using 9/16inch, 3/8-inch drive socket and
ratchet handle.
c. If connection (1) is frayed or broken, replace battery ground cable (page 2-696).
Step 7.
Check starter neutral safety switch terminals (3 and 4) and connector (5) for loose, corroded, frayed
or broken connections.
a. If terminals (3 and 4) and connector (5) are not loose, corroded, frayed or broken, go to step 8.
b. If connections at terminals (3 and 4) are loose, push connector (5) on all the way.
c. If connections at terminals (3 and 4) and connector (5) are corroded, clean using wire brush.
d. If terminals (3 or 4) are broken, replace starter neutral safety switch (page 2-471).
e. If connection at connector (5) is frayed or broken, repair (page 2-137).
Step 8.
Check 40 ampere circuit breaker terminals (6 and 7) and wire terminals (8 thru 10) for loose,
corroded, frayed, or broken connections.
2-20

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