Question about 1999 Cadillac DeVille

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Blower fan not working

The blower fan was working prior to taking the car in for a new A/C compressor. After the repair was made, the blower fan stopped working. The ground is good, the red wire has power, but the grey wire from the Heater A/C controller has no voltage. The mechanic says he is not getting any A/C related codes. Does the Heater A/C controller need to be reset and if so, what is the procedure to do so? I appreciate any help.

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  • Cadillac Master
  • 54,834 Answers

The "mechanic" failed to complete the repair correctly.

Posted on Jul 19, 2017

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6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

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Posted on Jan 02, 2017

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Anonymous

  • 92 Answers

SOURCE: 2000 Ford F-250, Fan switch/ blower motor...

sounds like blower motor resistor is shot.

Posted on Oct 26, 2008

Testimonial: "Good call. That did it. Thanks "

michigan man

edgar walker

  • 3533 Answers

SOURCE: 1996 Deville AC/Heater Blower (Fan) Stopped Blowing

I would recommend a salvage yard to get a good used one alot cheaper also try this place they carry only GM parts: Schram Auto and truck parts 1-800-292-1032 and also explain to them the problem you are having and these guys can assist you in getting the right part

Posted on Feb 05, 2009

Dale Long

  • 192 Answers

SOURCE: No power to blower motor on grey wire

I would say the blower motor resistor has gone out. The front dash module or the rear one.


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Posted on Apr 22, 2009

Anonymous

  • 24 Answers

SOURCE: 1999 cadillac deville blower dont

red black and gray are just half the connections. Red is positive 12 volts coming from fuse of circuit breaker. The black wire is either the ground or the main hot wire going to the blower motor (3 pin connection only), and the gray wire (if is is small in size) is a variable voltage coming from the body control module requesting speed for the blower motor.The blower control module varies voltage on the main wire going to the blower motor, supposedly in accordance with the requested voltage from the body control module. Usually if all fuses are okay and present on the apprpriate wire of the blower control module, the a blower motor that will not run or stays running after the key is turned off is the fault of the blower control module. If the blower control module has failed the the cause must be determined (over amping blower motor) or else new blower control module may fail when powered up.Usually blower control modules have more than three wires. Usual connections are: B+ (battery voltage) GND (chassis or engine ground), two large wires going directly to blower motor (can be any color, but are usually 10 guage in size), and an optional wire that reports voltage level back to the body control module.

Posted on May 29, 2009

roniecon

Ronny Bennett Sr.

  • 6927 Answers

SOURCE: 1993 Buick Lesabre Limited A/C problem

disconect the negative battery cable from battery for 20 seconds and replace cable back,then try ac let me know if this helps u

Posted on Jun 30, 2009

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It's normal that your car is running hot because the radiator fan works in conjunction with your ac compressor. If the ac is on, the radiator fan will be on and therefore the engine coolant temperature will stay in it's normal operating range. If the ac is off, the radiator fan will stay off as well and the engine coolant temperature gauge will begin to rise and show pretty hot (especially at idle). It will do this up until a certain degree then the radiator fan should turn on thermostatically and stabilize the temperature. It's scary and I know what your saying because it does that to my car if my ac isn't on. Don't worry it won't overheat.

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If it is the Blower Fan It may be seized as the Blower Fan motor doesn't have bearings it has a bronze bush & may be stuck. I had this fault on my 76 244DL.
I had to dismantle the whole dash pull the Blower Fan apart re grease the bush & give it a clean & re assemble. It took me allll day to pull the dash apart fix the Blower Fan motor & reasemble It works perfect now like new.

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