TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
5.
HAND-HELD SPOTLIGHT DOES NOT OPERATE (MODEL A ONLY) (continued).
KNOWN INFO
6.
TEST OPTIONS
Continuity Test.
Worklight OK.
Is there continuity be-
Spotlight bulb OK.
tween the cab control
REASON FOR QUESTION
Supply harness OK.
box (24-pin) linking
harness connector (J2),
Power is transferred from
POSSIBLE PROBLEMS
position E, and the
the supply harness to
supply harness connec-
the (24-pin) linking
Cab control box faulty.
tor (J1), position G?
harness through the cab
Linking harness faulty.
control box. An open
Main junction box
circuit in the control box
harness faulty.
will prevent spotlight
Worklight harness faulty.
operation.
Repair cab control
NO
box (para 4-71).
YES
4-
Change 1
4-106
