Quantcast CAB DEFROSTER FAN(S) DO NOT OPERATE - continued - TM-10-3930-673-20-10148

 

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CAB DEFROSTER FAN(S) DO NOT OPERATE - continued - TM-10-3930-673-20-10147
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CAB DEFROSTER FAN(S) DO NOT OPERATE - continued - TM-10-3930-673-20-10149
TM 10-3930-673-20-1
4. CAB DEFROSTER FAN(S) DO NOT OPERATE (CONT).
10
KNOWN INFO
TEST OPTIONS
Fan OK.
Voltage test.
Is 24 vdc present at starter
Ground OK.
STE/ICE-R #88.
motor solenoid where wire 9
Wire 80 OK.
REASON FOR QUESTION
connects?
Circuit breaker CB8 OK.
This question eliminates possible
Wire 3 OK.
problems and determines where
Relay K1 OK.
troubleshooting continues.
Wire 1 OK.
Circuit breaker CB6 OK.
POSSIBLE PROBLEMS
Wire 9 faulty.
Connector J2 faulty.
Connector P2 faulty.
Service or replace
NO
battery cable
(Para 8-42)
YES
Go to Step 12 of
this fault.
11
KNOWN INFO
TEST OPTIONS
Fan OK.
Continuity test.
Is continuity present on wire 9
Ground OK.
STE/ICE-R #91.
between connector P2-1 and
Wire 80 OK.
REASON FOR QUESTION
wire 9, where wire 9 connects
Circuit breaker CB8 OK.
If continuity is not present, wire 9
Wire 3 OK.
to starter motor solenoid?
or connector J2 faulty.
Relay K1 OK.
Wire 1 OK.
Circuit breaker CB6 OK.
POSSIBLE PROBLEMS
Wire 9 faulty.
Connector P2 faulty.
Connector J2 faulty.
Repair P2 or wire 9
NO
(Para 8-49).
YES
2-96

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