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
8.
Visual inspection.
Cab and remote controls
Is circuit breaker
inoperative.
CB15 OK (not
tripped)?
REASON FOR QUESTION
POSSIBLE PROBLEMS
The main power supply to
CB15 faulty.
the CBT electrical system
Quick-disconnect
is from CB15. If this
couplings not installed
circuit breaker is tripped,
properly.
the LHS/winch (as well as
Hydraulic lines, hoses,
other items) will not
or fittings faulty.
function.
Relay K9 faulty.
Cab control box faulty.
Linking harness faulty.
Main junction box wiring
faulty.
Reset circuit
NO
CBT ground circuit faulty.
breaker.
Free flow valve solenoid
harness faulty.
Free flow valve solenoid
faulty.
YES
4-364
