TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
13. MAIN FRAME DOES NOT LOAD IN MANUAL MODE (MODEL A ONLY)
(continued).
CONTINUITY TEST
(1) Open hydraulic cabinet cover.
(2) Loosen four screws on main
junction box cover and open
cover.
CAUTION
Electrical power must be shut
WIRING REMOVED FOR CLARITY
off from circuit before conti-
nuity can be checked. Failure
to comply with this caution
may result in damage to test
equipment or electrical sys-
tem.
(3) Remove main junction box
connector (P4) from main junction
box.
(4) Set multimeter to ohms position.
NOTE
A reading of infinity indicates an
open circuit.
(5) Connect multimeter to terminals
at each end of wire, and check
MAIN JUNCTION BOX
multimeter for continuity. Check
CONNECTOR (J4)
between main junction box
connector (J4), position H, and
terminal strip, position 15. Also
check between main junction box
connector (J4), position Q, and
terminal strip, position 16.
MAIN JUNCTION BOX
CONNECTOR (P4)
4-261
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