4-12. UNIT TROUBLESHOOTING (continued).
16. MAIN FRAME, HOOK ARM, AND WINCH DO NOT OPERATE (continued).
(1) Open hydraulic cabinet cover.
(2) Loosen four screws on main junction
box cover and open cover.
Electrical power must be shut
off from circuit before continu-
ity can be checked. Failure to
comply with this caution may
result in damage to test equip-
WIRING REMOVED FOR CLARITY
ment or electrical system.
A reading of infinity indicates an open
(4) Connect multimeter to terminals at
each end of wire and check
between main junction box connector
(J4), position A, and terminal strip,
position 23. Also check between
MAIN JUNCTION BOX
main junction box connector (J4),
position N, and terminal strip,