TM 5-3805-261-23-1
ELECTRICAL SYSTEM TROUBLESHOOTING PROCEDURES - CONTINUED
0008 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
d. Connect meter positive lead where
38. Heater Will Not Operate or
black wire connects (switch side).
Will Not Operate in High
Speed or Low Speed Position
e. Connect meter negative lead to
(CCE Machine) - Continued.
either of the other two terminals
(switch side).
f. Toggle switch between all three
positions and observe meter.
g. Repeat Steps d through f for the
1. If continuity is indicated in HIGH for
remaining terminal.
wire and LOW for wire, but not in OFF
2. If continuity is not indicated as stated
above, replace heater switch (WP 0212
NOTE
39. Defrosters Will Not Operate
or Will Not Operate in High
The following procedure is applicable for both front and rear
Speed or Low Speed (CCE
defroster fans.
Machine).
1.
Test defroster fan circuit voltage.
a. Place battery disconnect switch in
OFF position.
b. Check defroster fan fuse.
1. Replace fuse if blown (WP 0097 00).
2. If fuse is not blown, reinstall fuse and
go to Step c.
c. Identify high speed and low speed
control wires at defroster control
switch with tags or similar ID
technique.
d. Disconnect high speed and low
speed control wires from defroster
switch.
e. Set multimeter to appropriate
voltage range.
f. Place battery disconnect switch in
ON position.
g. Place defroster control switch to
low speed position and touch meter
positive lead to switch low speed
terminal. Observe meter reading.
