My 99 Expedition's front fan only works on high. From the research I've done, it looks like I'll need to replace to blower motor resistor. Unfortunately, I haven't the slightest idea what it looks like or where I can find it on my vehicle. Can anyone help?

Thanks!

 

Manaul temp controls, or EATC (electronic automatic temp control) ? The manual climate controlwill have a blower motor resistor, and the EATC will have a fan speed controller... Mounted in close to the same area (depending on which system you have) only the resistor optioned would be installed into the heat A/C plenium chamber, and the EATC fan controller would be mounted external to the chamber..

 

Hayapower, thanks. It's a manual system. I've already replaced the controller (the temp controller was very hard to turn, so it had to be replaced anyway)

I think I found the blower motor - mounted way up underneath the glove box. Could you describe where the resistor is mounted?

Bob

 

The EATC optioned units have a fan/blower 'speed controller' (a module) not the same as your temp control/fan selectionassembly.. The blower resistor will be mounted right next to the blower motor.. When you remove it, look at the coils/windings and you'll see a small 'diode' looking bullet shaped unit bridging the terminals.. Thats the thermal limiter and most times they burn out internal.. Use a test lead (or wire) and clip it to both the in/out of the thermal unit.. You should have all your fan speeds back.. Do replace the unit though if it proves to be bad..

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Hayapower, thanks again. Glad you included the picture because I was not sure what I was looking for. I was able to find it - with a mirror - and it needed to be replaced. Got a new one from my local Ford dealer and the job took all of 15 minutes.