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
CAUTION
~
Electrical power must be shut off
from circuit before continuity can
be checked. Failure to comply
ACCESS
with this caution may result in
UPPER
PANEL
damage to test equipment or
BODY
electrical system.
(1) Remove four screws and
lockwashers and access cover from
heater compartment.
(2) Remove four screws and
lockwashers from cab control box.
(3) Remove six screws from cab control
box, and separate upper body from
base.
(4) Set multimeter to ohms position.
NOTE
A reading of infinity indicates an
open circuit.
(5) Connect multimeter leads to switch
terminals. Hold the joystick in the
BASE
UNLOAD position and check
multimeter for continuity.
UNLOAD FUNCTION
SWITCH
Change 1
4-233
