TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
12. HOOK ARM DOES NOT UNLOAD IN MANUAL MODE (MODEL A ONLY) (continued).
CONTINUITY TEST
(1) Remove four screws and
lockwashersand access cover from
heater compartment.
(2) Remove cab control box connector
(P2) from cab control box.
CAUTION
Electrical power must be shut off
from circuit before continuity can
be checked. Failure to comply
with this caution may result in dam-
age to test equipment or electrical
system.
(3) Remove main junction box connector
(J4) from junction box.
(4) Set multimeter to ohms position.
MAIN JUNCTION BOX
CONNECTOR (P4)
NOTE
A reading of infinity indicates an open
circuit.
(5) Connect multimeter leads to each end
of wire, and check multimeter for
continuity. Check (24-pin) linking
harness, position G.
NOTE
Any reading besides infinity indicates
a grounded wire.
(6) Remove multimeter lead from one end
of wire and connect to chassis
ground.
CAB CONTROL BOX
CONNECTOR (P2)
Change 1
4-231
