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Page Title:
CAB DEFROSTER FAN(S) DO NOT OPERATE - continued |
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 TM 10-3930-673-20-1
CONTINUITY TEST
(1) Set multimeter to ohms.
(2) Connect multimeter positive (+) lead to
fan ground.
(3) Connect multimeter negative () lead to
fan guard.
(a) If continuity is present, go to Step 3
of this fault.
(b) If continuity is not present, replace
faulty fan (Para 17-6).
VOLTAGE TEST
(1) Remove four screws and access panel.
(2) Set multimeter to volts dc.
(3) Connect multimeter positive (+) lead to
circuit breaker CB8 where wire 80
connects.
(4) Connect multimeter negative () lead to
known good ground.
(5) Connect negative battery cable to
negative side of battery (Para 8-44).
(6) Turn engine start switch ON, BUT DO
NOT START ENGINE
(TM 10-3930-673-10).
(a) If 24 vdc is present, repair wire 80
(Para 8-48).
(b) If 24 vdc is not present, go to
Step 4 of this fault.
(7) Turn engine start switch to OFF
position (TM 10-3930-673-10).
(8) Disconnect negative battery cable
(Para 8-42).
TR01088
2-89
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