TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
12. HOOK ARM DOES NOT UNLOAD IN MANUAL MODE (continued).
HOOK ARM
SWITCH
EMERGENCYSTOP
SWITCH
CONTINUITY TEST
(1) Disconnect remote control
cable from remote control unit.
(2) Set multimeter to ohms
position.
(3) Position EMERGENCY STOP
switch in the ON position.
(4) Have assistant hold the HOOK
ARM switch in the UNLOAD
position.
REMOTE CONTROL
NOTE
REMOTE CONTROL
CONNECTOR (J9)
A reading of infinity indicates
an open circuit.
(5) Connect multimeter leads to
remote control connector (J9),
positions "E" and "L"on remote
control unit, and check
multimeter for continuity.
(6) Repeat Step 5, but this time
check for continuity between
positions "L" and "K".
REMOTE CONTROL
UNIT
4-221
Change 1
