TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
16. MAIN FRAME, HOOK ARM, AND WINCH DO NOT OPERATE (continued).
13.
KNOWN INFO
TEST OPTIONS
Continuity Test.
Is there continuity
Cab control box main
between the main
power supply OK.
REASON FOR QUESTION
junction box connec-
Cab and remote control
tor (J4) and the junc-
inoperative.
To verify the integrity of
tion box terminal
CB15 OK.
the main junction box
strip?
Hydraulic system OK.
wiring.
Cab control box OK.
Linking harness OK.
POSSIBLE PROBLEMS
Main junction box wiring
faulty.
CBT ground circuit faulty.
Free flow valve solenoid
Replace main
harness faulty.
junction box wiring
NO
Free flow valve solenoid
faulty.
YES
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