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Blower Motor not working 2000 Grand Marquis

The motor works when directly attached to power. Voltage across wire into blower is 0. Voltage from hot wire to ground is 14 volts. Voltage on second wire is zero and is not grounded.

I've gathered this may be a problem with the blower controller resistor. Where exactly is this located? I've read one post that says this is in the engine compartment, another says under the dash, and still another inside the plenum.

Thanks.

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  • 2 more comments 
  • Anonymous Feb 09, 2009

    my 1991 g marquis will not blow air heat or ac

  • Anonymous Feb 26, 2009

    my blower isnt working and i cant find the fuse, i have no manual!

  • Anonymous Mar 09, 2009

    no power to the fan blower in mercury marquis



  • Anonymous Mar 28, 2009

    took it in had it fixed guy said it was a loose wire on control board, cost me $65. now ( bout 7 months later ) is not working again. guy told me that if is broke again I should just think bout replacing the control board. he said the board cost bout $100. was wondering if any one has any pictures of where it's located on a 2000 Mercury Grand Marquis so I can check and see if the wire just came loose again before I take it back and get the board replaced.

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5 Suggested Answers

freetek
  • 5568 Answers

SOURCE: HEAT/AC blower motor stopped working

It's even odd that you were getting a step-type voltage when you first checked.
Many speed regulators are simple tapped resistors with the switch selecting which tap is connected to the motor.
More elegant controls would use a semiconductor (transistor) and a few other components to supply step-variable voltage to the motor.

To determine which is used on your car, you will at least need the electrical diagram for it, preferably an aftermarket service manual - Haynes or Chilton should be available at least in the US and Canada.
Those will contain not only the electrical info you now lack but possibly instructions that will aid in locating the controlling circuit.
I suspect that circuit is faulty; if the resistor type, it will be a device with mulitple taps, if solid state, a few parts on a small board.

Posted on Jun 18, 2008

  • 3 Answers

SOURCE: heat-a/c blower motor stopped

check for ground going to fan. If there is no ground replace a/c control panel located under radio it what you use to turn on the heater/ a/c

Posted on Aug 27, 2008

  • 1 Answer

SOURCE: Climate Control Blower motor stopped working

I had the same problem with my 2000 Mercury Grand Marquis. I ended up replacing the blower and the resistor which is on the passenger center side of the firewall tucked in where it is hard to get to. Everything worked fine for about two years. It just went out again here about a month ago. I am going to try to replace the resistor again, but I am wondering if it doesnt have something to do with the climate control switch. I do not want to replace the same part every year or two, so if anyone has a idea of what could possibaly be the bigger problem, please let me know.

Posted on Nov 22, 2008

chuck943
  • 783 Answers

SOURCE: Location of blower motor switch resistor on 2004 Grand Marquis

The blower speed controller is located under the hood on the right or passenger side on the heater housing just to the side of the heater hoses near the very back of the right cylinder head.
Yes that would cause the concern you are having.

Posted on Feb 05, 2009

  • 82 Answers

SOURCE: Heat and Air blower does not work

hey there cjwalker,,did you try the blower ressistor its located beside the heatermotor ,,it controlls the speed of the motor ..should be easy to remove ,,,either 2 screws or else it just clips in,,,,,

Posted on Apr 19, 2009

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