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
15.
Continuity Test.
Cab control box main
Is continuity measured
power supply OK.
on the free flow valve
Cab and remote control
solenoid harness?
REASON FOR QUESTION
inoperative.
Power to activate the free
CB15 OK.
flow valve solenoid is
Hydraulic system OK.
transferred from the main
Cab control box OK.
junction box to the
Linking harness OK.
solenoid via this harness.
Main junction box wiring
OK.
CBT ground circuit OK.
POSSIBLE PROBLEMS
Free flow valve solenoid
harness faulty.
Replace free flow
Free flow valve solenoid
valve solenoid wire
NO
faulty.
harness (para 4-
YES
4-378
