TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
11. HOOK ARM DOES NOT LOAD IN MANUAL MODE (MODEL A ONLY) (continued).
VOLTAGE TEST
(1) Turn engine start switch to ON
position.
(2) Turn light control switch to STOP
HOOK ARM
LIGHT position.
UNLOAD (ORANGE)
(3) Rotate LHS MODE SELECT switch
to position 2 (hook arm in manual
mode) position.
(4) Set multimeter to voltage position.
CAUTION
When checking voltage, use cau-
tion not to short or ground the
terminal being checked. Fail-
ure to comply with this caution
may result in damage to vehicle
or test equipment.
NOTE
HOOK ARM
Refer to illustration for correct
LOAD (ORANGE)
wire.
(5) Place positive (+) probe of
multimeter on orange (LOAD) wire
on selector switch.
(6) Place negative (-) probe of
multimeter on known good ground.
NOTE
This test can also be accomplished
by observing the status of LED
D15 while performing Step 7.
(7) Hold joystick in LOAD position, and
check multimeter for voltage
reading.
(8) Turn engine start switch and light
control switch to OFF position.
4-213
Change 1
4
