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Page Title:
CAB DEFROSTER FAN(S) DO NOT OPERATE - continued |
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 TM 10-3930-673-20-1
B CIRCUIT
VOLTAGE TEST
REAKER
C
(1) Set multimeter to volts dc.
B8
(2) Connect multimeter positive (+) lead to
circuit breaker CB8 where wire 3
connects.
(3) Connect multimeter negative () lead to
known good ground.
(4) Connect negative battery cable to
negative side of battery (Para 8-44).
(5) Turn engine start switch ON, BUT DO
WIRE 3
NOT START ENGINE
(TM 10-3930-673-10).
(a) If 24 vdc is present, replace faulty
circuit breaker CB8 (Para 8-11).
(b) If 24 vdc is not present, go to
Step 5 of this fault.
(6) Turn engine start switch to OFF
position (TM 10-3930-673-10).
(7) Disconnect negative battery cable
(Para 8-44).
VOLTAGE TEST
(1) Set multimeter to volts dc.
(2) Connect multimeter positive (+) lead to
relay K1 where wire 3 connects.
(3) Connect multimeter negative () lead to
known good ground.
(4) Connect negative battery cable to
negative side of battery (Para 8-44).
RELAY K1
(5) Turn engine start switch ON, BUT DO
NOT START ENGINE
(TM 10-3930-673-10).
(a) If 24 vdc is present, repair wire 3
(Para 8-48).
(b) If 24 vdc is not present, go to
Step 6 of this fault.
(6) Turn engine start switch to OFF
position (TM 10-3930-673-10).
(7) Disconnect negative battery cable
(Para 8-44).
WIRE 3
TR01089
2-91
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