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'02 Blazer heater fan only works on 2 and 3

  #1  
Old 01-09-2012, 04:55 PM
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Default '02 Blazer heater fan only works on 2 and 3

but not 1 and 4??? any ideas guys???
 
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Old 01-09-2012, 05:03 PM
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sounds like blower motor resistor...it mounts just to the right of the blower motor if your standing in front of truck.
if you do a search on it you may find a how to and some info to verify before buying a part.
 
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Old 01-09-2012, 05:52 PM
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thanks for the reply sir
 
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Old 01-09-2012, 06:40 PM
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Hi doesn't go through the resistor.
Check your underhood fuses, there's a 30a for just high speed. And a relay that's actuated in "4".
Not running in "1" would be the resistor
That or the speed switch is faulty
 
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Old 01-09-2012, 07:01 PM
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Thanks for the correction...i learned soemthing on this one too.
 
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