1991 Buick Park Avenue Heater fan inop with no blown fuses

1991 BUICK PARK AVENUE
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JTCOCHRAN
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Heater problem
1991 Buick Park Avenue 6 cyl Front Wheel Drive Automatic 150K miles

During road trip of 100 miles, smelled electical burning without associated smoke. assumed from outside source. all systems worked after, but fan was inop next morning. checked usual suspects all good. pulled codes got 00. controller calls for fan (bars climb) but gets none. could it be DC speed controller? what next?
Feb 27, 2009 at 11:18 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
If you power the blower motor purple wire from the battery postive post and it comes On-Either the blower control module or the HVAC programmer is defective
Feb 27, 2009 at 11:43 PM
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JTCOCHRAN
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tested voltage at fan connector and found 14 volts at max fan speed and 0 volts at min speed. I don't know why I was so quick to assume the worse. I will replace the fan and believe that will be that. I appreciate your quick response.
Feb 28, 2009 at 12:08 PM
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