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TM 10-3930-669-20
CONTINUITY TEST
(1)
Remove heater housing cover
(Para 16-8).
(2)
Disconnect heater motor connector.
(3)
Set multimeter select switch to OHMS.
(4)
Check continuity between heater
motor connector ground wire terminal
and a known good ground.
(a)
If there is no continuity, repair
ground wire (see schematic
Appendix F).
(b)
If there is continuity, replace fan
blower motor (Para 16-8).
(5)
Install heater housing cover.
VERIFY REPAIR
(1)
Set MAIN POWER switch to ON
position (TM 10-3930-669-10).
(2)
Set engine switch to ignition position.
(TM 10-3930-669-10).
(3)
Set heater blower switch to HIGH
position (TM 10-3930-669-10).
(a)
If blower does not operate, fault
not corrected. Perform Steps (4)
through (6) below. Replace fan
blower motor (Para 16-8).
(b)
If blower operates, fault corrected.
(4)
Set heater blower switch to OFF
position.
(5)
Set engine switch to off position.
(6)
Set MAIN POWER switch to OFF
position.
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