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
12.
Continuity Test.
Cab control box main
Is there continuity
power supply OK.
measured on the (24-
REASON FOR QUESTION
Cab and remote control
pin) linking harness
inoperative.
between cab control
Power to activate the free
CB15 OK.
box connector (P2) and
flow valve (as well as
Hydraulic system OK.
main junction box
other functions) is
Cab control box OK.
connector (P4)?
transmitted from the cab
POSSIBLE PROBLEMS
control box to the main
junction box via the (24-
Linking harness faulty.
pin) linking harness.
Main junction box wiring
faulty.
CBT ground circuit faulty.
Free flow valve solenoid
harness faulty.
Replace (24-pin)
Free flow valve solenoid
linking harness
NO
faulty.
YES
4-372
