TM 9-2350-230-12
Malfunction
Probable cause
Corrective action
TURRET ELECTRICAL SYSTEM
ACCESSORY SYSTEM
72. Ventilating fan does
a. Master switch off
a Turn master switch ON.
not operate when
switch is on
b. Loose wiring
b. Inspect and tighten electrt-
cal connections as
required.
c. Ventilating fan switch
c. Replace fan (fig. 10-35).
defective.
d. Defective fan motor
d. Replace fan.
73. Fan motor vibrates
Worn bearings
Replace ventilating fan.
excessively.
74. Insufficient circula-
a. Obstructed fan intake
a. Clean intake.
tion of air in vehi-
cle when fan is on
b. Low input voltage
b. Check cable terminals for
corrosion and loose con-
nections. Clean and
tighten. Check battery
voltage.
c. Fan slipping or damaged
c. Replace fan (fig. 10-35).
75. Dome light or lights
a. Master switch off
a. Turn master switch ON.
inoperative.
b. Faulty wiring circuit from
b. Notify support maintenance.
dome lights to accessory
box or contact ring.
c. Lamps burned out
c. Check and replace defective
lamps (fig. 9-96).
d. Faulty switch or switches
d. Check and replace dome
in dome lights
lights witches if defective
(figs. 9-95 and 9-96).
76. Air filter unit in-
a. Loose or defective electri-
a. Tighten or repair lead
operative
cal lead
(fig.
b. Defective rheostat
b. Notify support maintenance.
c. Purifier motor overheating
c. Replace precleaner and
or defective
housing. Refer to TM 3-
4240-236-20P.
8-30
