Quantcast 6.  FAN SPEED DOES NOT LOWER FROM HIGH SPEED TO LOW SPEED (CONT) - TM-9-2320-364-20-3_1048

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Page Title: 6. FAN SPEED DOES NOT LOWER FROM HIGH SPEED TO LOW SPEED (CONT)
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DIODE TEST - TM-9-2320-364-20-3_1047
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VOLTAGE TEST - TM-9-2320-364-20-3_1049
TM 9-2320-364-20-3 2-2926 6.  FAN SPEED DOES NOT LOWER FROM HIGH SPEED TO LOW SPEED (CONT). 12. YES NO Heater blower motor operates,   indicating CB15 OK. Fan speed does not lower when   hydraulic selector switch is in   the AUTO or CRANE/SRW   position. Rectifier OK. Wire 1733 faulty. Wire 1435 faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Voltage test. STE/ICE-R #89. If wire 1733 is loose, faulty, or shorted to ground, 22 to 28 vdc will not be input to high speed fan solenoid valve. WARNING Are 22 to 28 vdc measured on wire 1733 at high speed fan valve connector, terminal 2 with hydraulic selector switch in AUTO position? Repair wire 1733 (see schematic Fig 2-67) or notify DS Maintenance. Verify repair, go to Step 19 of this Fault. Read   WARNING on Page 2-2927

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