TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
11. HOOK ARM DOES NOT LOAD IN MANUAL MODE (continued).
CONTINUITY TEST
(1) Disconnect remote control
cable from remote control unit.
REMOTE CONTROL
(2) Set multimeter to ohms
CONNECTOR (J9)
position.
(3) Position EMERGENCY STOP
switch in the ON position.
(4) Have assistant hold the HOOK
ARM switch in the LOAD
position.
NOTE
A reading of infinity indicates
an open circuit.
(5) Connect multimeter leads to
REMOTE CONTROL
UNIT
positions E and L on remote
control unit, and check
multimeter for continuity.
(6) Repeat step 3, but this time
check for continuity between
positions L and K.
Change 1
4-199
