TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
4.
MAIN FRAME WORKLIGHT DOES NOT OPERATE (MODEL A ONLY) (continued).
CONTINUITY TEST
(1) Loosen four screws and remove cover
from main frame junction box.
CAUTION
MAIN FRAME
Electrical power must be shut off
JUNCTION BOX
CONNECTOR (P6)
from circuit before continuity can
be checked. Failure to comply with
this caution may result in damage
to test equipment or electrical sys-
tem.
(2) Set multimeter to ohms position.
NOTE
A reading of infinity indicates an
open circuit.
(3) Connect multimeter leads to each end
of wire, and check multimeter for
continuity. Check between the main
frame junction box harness connector,
position H, and the main frame
junction box terminal strip, position 7.
NOTE
MAIN FRAME
JUNCTION BOX
Any reading besides infinity indi-
TERMINAL STRIP,
cates a grounded wire.
POSITION 7
(4) Remove multimeter lead from one end
of wire and connect to chassis ground.
Change 1
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