TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
13. MAIN FRAME DOES NOT LOAD IN MANUAL MODE (MODEL B ONLY)
(continued).
HYDRAULICCABINET
COVER
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-
tem.
POSITION
(1) Remove six screws and flatwashers
1
from hydraulic cabinet cover and
MAIN FRAME LOAD
remove cover.
SOLENOID
(2) Remove right hand (J3) and left hand
CONNECTOR
(J4), 40-pin connectors from digital
POSITION
2
contoller.
(3) Set multimeter to ohms position.
NOTE
POSITION 2
J3
POSITION
A reading of infinity indicates an
32
POSITION
open circuit.
35
POSITION
(4) Connect multimeter between digital
33
controller wiring harness connector,
(P2), position "2", and (J4), position
"1". Check multimeter for continuity.
POSITION
(5) Connect multimeter between (P2),
1
position "3", and (J4), position "35".
Check multimeter for continuity.
(6) Connect multimeter between (P2),
J4
position "4", and (J4), position "33".
Check multimeter for continuity.
(7) Connect multimeter between (J3),
position "2", and main frame load
solenoid connector, position "1".
P2
Check multimeter for continuity.
(8) Connect multimeter between (J3),
position "2", and main frame load
solenoid connector, position "32".
Check multimeter for continuity.
POSITION 4
POSITION 3
Change 1
4-265
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