TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
4.
MAIN FRAME WORKLIGHT DOES NOT OPERATE (continued).
WORKLIGHT SWITCH TEST
(1) Remove eight screws and side
panel from heater compartment.
(2) Move cab worklight switch to
the ON position.
CAUTION
Electrical power must be shut
off from circuit before conti-
nuity can be checked. Fail-
ure to comply with this cau-
tion may result in damage to
WORKLIGHT
test equipment or electrical
SWITCH
system.
TERMINALS
(3) Set multimeter to ohms
position.
NOTE
A reading of infinity indicates
a faulty switch.
WORKLIGHT
(4) Connect multimeter leads to
SWITCH
worklight switch terminals, and
TERMINALS
check multimeter for continuity.
(SWITCH REMOVED FROM PANEL FOR CLARITY)
4-81
