TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
4.
MAIN FRAME WORKLIGHT DOES NOT OPERATE (MODEL A ONLY) (continued).
10.
TEST OPTIONS
KNOWN INFO
Worklight bulb OK.
Continuity Test.
Is there continuity
Spotlight OK.
measured in the
REASON FOR QUESTION
Supply harness OK.
worklight harness?
Cab control box OK.
Power is transferred from
Linking harness OK.
the main frame junction
Main junction box OK.
box to the worklight via
Main frame junction box
this wire harness.
harness OK.
POSSIBLE PROBLEMS
Worklight harness faulty.
Replace worklight
wire harness
NO
YES
Fault not corrected.
Notify supervisor.
Change 1
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