TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
11. HOOK ARM DOES NOT LOAD IN MANUAL MODE (MODEL A ONLY) (continued).
KNOWN INFO
7.
TEST OPTIONS
Does not operate with
Is there continuity
Continuity Test.
remote control or cab
between the main
REASON FOR QUESTION
controls.
junction box connec-
Hook arm load solenoid
tor (J4) and the junc-
To verify the integrity of
harness OK.
tion box terminal
the main junction box
strip?
wiring.
POSSIBLE PROBLEMS
Main junction box wiring
faulty.
Linking harness faulty.
Directional control valve
faulty.
Replace main
junction box wiring
NO
YES
4-206
Change 1
