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Discussion Starter · #1 ·
Cab air and heater blower did not work on high setting. Only low and med. Put in a new blower switch and still on low and Med.?? Where to from here? Could there be a separate wire for high setting going to the blower cut?
 

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Look for a failed resistor between the switch and the fan motor. If there's no resistor, it could be the motor itself.
 
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