TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
16.1 MAIN FRAME, HOOK ARM, AND WINCH DO NOT OPERATE (MODEL B ONLY)
(continued).
HYDRAULIC
CABINETCOVER
CONTINUITY TEST
CAUTION
Electrical power must be shut off
from circuit before continuity can
be checked. Failure to comply with
this caution may result in damage
to test equipment or electrical sys-
P2
tem.
(1) Remove six screws and flatwashers
from hydraulic cabinet cover and
remove cover.
POSITION 2
POSITION 4
(2) Remove left hand (J4), 40-pin
connector from digital contoller.
(3) Set multimeter to ohms position.
POSITION 3
NOTE
A reading of infinity indicates an
open circuit.
(4) Connect multimeter between digital
controller wiring harness connector,
(P2), position "2", and (J4), position
"1". Check multimeter for continuity.
(5) Connect multimeter between (P2),
position "3", and (J4), position "35".
Check multimeter for continuity.
(6) Connect multimeter between (P2),
position "4", and (J4), position "33".
Check multimeter for continuity.
POSITION 35
POSITION 33
J4
POSITION 1
Change 1
4-4-399
386.3
