4-12. UNIT TROUBLESHOOTING (continued).
13. MAIN FRAME DOES NOT LOAD IN MANUAL MODE (MODEL A ONLY)
CAB CONTROL BOX
Electrical power must be shut off
be checked. Failure to comply with
this caution may result in damage
to test equipment or electrical sys-
(1) Disconnect main junction box
connector (P4) from junction box.
A reading of infinity indicates an open
(3) Connect multimeter to leads at each
end of wire, and check multimeter for
harness, position H.
Any reading besides infinity indicates
a grounded wire.
of wire and connect to chassis ground.
MAIN JUNCTION BOX