TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
12. HOOK ARM DOES NOT UNLOAD IN MANUAL MODE (MODEL A ONLY) (continued).
KNOWN INFO
7.
TEST OPTIONS
Continuity Test.
Does not operate with
Is continuity measured
remote control or cab
between the main
REASON FOR QUESTION
controls.
junction box connector
Hook arm UNLOAD
(J4) and the junction
To verify the integrity of
solenoid harness OK.
box terminal strip?
the main junction box
wiring.
POSSIBLE PROBLEMS
Main junction box wiring
faulty.
Linking harness faulty.
Directional control valve
faulty.
Replace main
junction box wiring
NO
YES
4-228
Change 1
