1993 Buick Lesabre blower fan

1993 BUICK LESABRE
204,000 MILES • 3.2L • 6 CYL • FWD • AUTOMATIC
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RADGAST14
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  • 2 POSTS
blower fan doesn't work on high speed, fan stops/starts, stops/starts, have replaced fan, relay, small finned part above fan that affects performance, and the main control unit, all parts new except control unit, when fan stops when on a/c control unit becomes hot on bottom right side below selector buttons. thanks,John
May 19, 2014 at 10:30 PM
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WRENCHTECH
  • ✓Experienced Mechanic
  • 20,760 POSTS
Try rapping on the motor with a screwdriver handle the next time it stops. If it starts then, replace the motor.
May 19, 2014 at 11:06 PM
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RADGAST14
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  • 2 POSTS
Thanks, also can I unhook the three pronged socket going to the blower, start the engine and use a ohm meter on each prong one at a time, to see if its getting any or the right amount of electricity? Is there someplace I can look up what the reading should be? Thanks again, John
May 24, 2014 at 12:22 AM
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WRENCHTECH
  • ✓Experienced Mechanic
  • 20,760 POSTS
It should be a 2 wire plug and yes, you can test for power and ground with a test light or voltmeter, not an ohmeter.
May 24, 2014 at 1:49 AM
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