TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
14. MAIN FRAME DOES NOT UNLOAD IN MANUAL MODE (MODEL A ONLY)
(continued).
CONTINUITY TEST
(1) Open hydraulic cabinet cover.
(2) Loosen four screws on main junction
box cover and open cover.
(3) If necessary, remove remote control
cable from linking harness connector.
CAUTION
Electrical power must be shut off
WIRING REMOVED
from circuit before continuity can
FORCLARITY
be checked. Failure to comply with
this caution may result in damage
to test equipment or electrical sys-
tem.
(4) Set multimeter to ohms position.
NOTE
A reading of infinity indicates an open
circuit.
RH LINKING
(5) Connect multimeter to terminals at
HARNESS
each end of wire, and check
CONNECTOR (J8B)
multimeter for continuity. Check
between terminal C on connector and
position 7 in junction box. Next,
check between terminal J on
connector and position 23 in junction
box. Finally, check between terminal
H on connector and position 30 in
junction box.
NOTE
Any reading besides infinity indicates
a grounded wire.
(6) Check for grounded wiring by
connecting one multimeter lead to
each terminal and the other lead to
chassis ground.
LH LINKING HARNESS
CONNECTOR (J8A)
Change 1
4-277
