ARMY
NAVY
TM5-6115-612-12
AG-320BO-OMM-OO0
4-78. SWITCHES.
Maintenance of the
control panel
switches
consists of
testing and replacement.
a. Test.
WARNING
To prevent Injury, ensure that
battery is
disconnected before
performing
maintenance
o n
electrical components.
(1) Disconnect battery cable plug
connector from battery.
(2) Open control panel access
d o o r .
(3) Loosen turnlock fasteners and
open control panel.
(4) Perform continuity check on
DC CIRCUIT BREAKER (28, figure 4-43).
(a) Ensure that reset button on
front of panel is pressed in.
(b) Place
multimeter
probes
across
terminals
of
DC
CIRCUIT
BREAKER.
Multimeter reading should
show less than 1 ohm.
If reading is
more than 1 ohm,
replace DC CIRCUIT
BREAKER (paragraph 4-78b).
(5) Perform continuity check on
CONTACTOR switch (29, figure 4-43.)
(a) Refer to figure 4-46 and
place multimeter probes on terminals 2
and 3 of CONTACTOR switch.
(b) Place CONTACTOR switch in
OPEN
position.
Multimeter
reading
should be less than one ohm.
If read-
ing is more
than one ohm, replace
CONTACTOR switch (paragraph 4-78b).
Figure 4-46.
Contactor Switch Test
4-140
