TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
16. MAIN FRAME, HOOK ARM, AND WINCH DO NOT OPERATE (continued).
TEST OPTIONS
KNOWN INFO
14.
Continuity Test.
Cab control box main
Is continuity measured
power supply OK.
between the main
Cab and remote control
junction box terminal
REASON FOR QUESTION
inoperative.
strip, position 24, and a
If there is an open circuit
CB15 OK.
known good ground?
in the ground portion of
Hydraulic system OK.
the CBT electrical
Cab control box OK.
system, the LHS/winch
Linking harness OK.
(as well as other items)
Main junction box wiring
will not operate.
OK.
POSSIBLE PROBLEMS
CBT ground circuit faulty.
Free flow valve solenoid
harness faulty.
Repair ground wire
Free flow valve solenoid
(see schematic,
NO
faulty.
YES
4-376
