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Thread: 1999 Mercury Sable fan switch

  1. #1
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    1999 Mercury Sable fan switch

    my fan switch does not work when turned to low or medium. It only works on high. I finally got the dashboard out and replaced the switch. Still problem exists. Is there any place on line I could go to get a wire diagram and see how this switch is wired or where the fan motor in located in the vehical?
    Any suggestions would be appreciated.
    Thanks,
    Bob

  2. #2
    Variable Bitrate
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    I have heard that there is a high and low speed controller on the later fan itself. I would have it looked at or throw in a aftermarket/new one.
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  3. #3
    Newbie Matt Crooke's Avatar
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    There will be (i think this is the proper name for it) a resistor inline with the switch wiring. This is the thing that regulates the voltage to the fan thus giving you the different speeds. I had the same thing happen on a Ford Mondeo i used to have, it turned out to be located in the passenger footwell. Strange but true!
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  4. #4
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    You are right about "resistor". there is a resistor pack next to the fan motor and usually it attach to the "air hose/pipe" after the blower. It is nothing but a modue with couple "spring" resistor and those "spring" probably broke/blew due to heat/resistant.
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  5. #5
    Newbie Matt Crooke's Avatar
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    Quote Originally Posted by MatrixPC
    You are right about "resistor". there is a resistor pack next to the fan motor and usually it attach to the "air hose/pipe" after the blower. It is nothing but a modue with couple "spring" resistor and those "spring" probably broke/blew due to heat/resistant.

    That the one, it was a spring type thing that had broken. It was quite expensive if i remember as well. Typical Ford part, ie it could only be bought new!!!
    Im an Essex Boy....I cant help it!!

  6. #6
    Constant Bitrate BLK MAJK's Avatar
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    I just replaced the one on my fiance's 98 honda civic..it was $28 at the stealership...took me about 2 minutes to replace it
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