1999 Ford Windstar Blower Speed

1999 FORD WINDSTAR
20,000 MILES • 6 CYL • FWD • AUTOMATIC
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MCAVINEE
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  • 69 POSTS
I have a heater motor that runs only on high. Removed teh resister and it looks a little rusty but no burn marks. How can I determine if it is the resister and not the blower
Aug 31, 2010 at 7:37 AM
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WRENCHTECH
  • ✓ASE Certified Mechanic
  • 20,761 POSTS
  • ASE Certified Mechanic
You can use a ground sensing testlight to test for ground signals arriving at different wires at the plug as the switch speeds are changed but chances are real good that the resister is the problem. Switch problems are rare.
Aug 31, 2010 at 7:44 AM
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