1999 Mercury Sable fan switch

**rcole545** · 01-17-2006, 07:59 PM

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

**Haystack** · 01-18-2006, 08:15 AM

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.

**Matt Crooke** · 02-06-2006, 09:20 AM

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!

**MatrixPC** · 02-06-2006, 10:02 AM

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.

**Matt Crooke** · 02-06-2006, 12:39 PM

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!!!