Question about 1999 Mercury Grand Marquis

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Heat and Air blower does not work

I have a 1999 Grand Marquis that the heat and air blower has failed. I do have power to the blower motor, and when I apply a ground to the neg. pin of the blower motor it runs at full speed. There is no control so must assume the switch and speed controls come down stream on the neg. side of the blower. I have the climate control type system, all other functions seem to work, the A/C will come on, heat and can switch where air flow goes. Just no fan. I take it there is a fan relay or control module somewhere, as there isn't any conductors large enough on the control in the dash to run the fan. What should I check now and where are the rest of the controls located?

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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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