TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
13. MAIN FRAME 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
LIGHT position.
(3) Rotate MODE SELECT switch to
position 3 (main frame in manual
mode).
MAIN FRAME
(4) Set multimeter to voltage position.
UNLOAD (YELLOW)
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
Refer to illustration for correct wire.
(5) Place positive (+) probe of
multimeter on yellow (LOAD) wire
on MODE SELECT switch.
(6) Place negative (-) probe of
multimeter on known good ground.
MAIN FRAME
LOAD (YELLOW)
NOTE
This test can also be accomplished
by observing the status of LED D31
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.
4-259
Change 1
