TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
11. HOOK ARM DOES NOT LOAD IN MANUAL MODE (MODELA ONLY) (continued).
KNOWN INFO
8.
TEST OPTIONS
Does not operate with
Is there continuity
Continuity Test.
remote control or cab
measured on the (24-
REASON FOR QUESTION
controls.
pin) linking harness
Hook arm load solenoid
between cab control
During cab control opera-
harness OK.
box connector (P2)
tion, this harness provides
Main junction box wiring
and main junction box
power to the hook arm
OK.
connector (P4)?
load solenoid. During
remote control operation,
POSSIBLE PROBLEMS
the harness provides a
Linking harness faulty.
signal to activate the free
Directional control valve
flow valve.
faulty.
Replace (24-pin)
linking harness
NO
Directional control
valve is faulty, notify
YES
Direct Support
maintenance.
4-208
Change 1
