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Blower speed controller diagnose, pls help!

Discussion in 'Stock 1995 - 2001 Explorers' started by 770mark, July 18, 2011.

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    1. 770mark

      770mark New Member

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      City, State:
      atlanta, ga
      Year, Model & Trim Level:
      2000
      I've read a ton of posts, but none really covered what I'm finding.

      It's a 2000 Explorer with climate control. The front fan does not blow at all. The rear does and works fine. The A/C cycles fine, but regardless of the control settings, no fan.

      I removed the fan connecter and it shows 14.4 volts, so figured it was the fan motor. I plugged a new motor into the harness before installation just to be sure that was it and still no fan! I checked the new one and it works fine w straight battery voltage, but not when connected to the car's harness despite showing 14+ volts at the connector.

      Does the controller adjust amperage vs voltage on this system? Any help you can offer on diagnosing this would be a big help...

      THANKS!!
       
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    3. budwich

      budwich Well-Known Member

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      In "actuality", it provides "varying paths to ground".... thru a "resistor bridge" (although maybe a bit more "solid state")... thus varying the current. Your problem appears to be the "classic speed control busted" problem.
       

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