1999 Cadillac Deville Blower Fan

Tiny
WAKEBOARDX
  • MEMBER
  • 1999 CADILLAC DEVILLE
  • V8
  • 2WD
  • MANUAL
  • 130,000 MILES
We just had a mechanic replace the A/C Compressor on the car. However, now the blower fan is not working. There is power to the fan and the ground is good. When voltage is applied to the grey wire, the fan works. However, there does not seem to be any power coming out of the grey wire. He says he is not getting any A/C codes from the computer. Is there a way to reset the Heater A/C controller to see if that is the problem before we buy a new controller?
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Friday, June 11th, 2010 AT 11:58 AM

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Tiny
FACTORYJACK
  • EXPERT
If there is no voltage coming out the gray wire, it is a direct output from the A/C programmer. The only thing additional you could do is check the continuity of that wire from the blower to the programmer to verify it is not open. You should be checking power at that wire with a voltmeter, as it is not always 12 volts, and a test light may not light even though there is power. It ranges usually from 4 to 9 volts.
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Saturday, June 12th, 2010 AT 2:17 AM

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