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Old 05-02-2008, 08:25 AM
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Default 99 Expy blower motor resistor

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!
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Old 05-02-2008, 12:50 PM
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Default RE: 99 Expy blower motor resistor

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..
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Old 05-02-2008, 01:08 PM
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Default RE: 99 Expy blower motor resistor

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
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Old 05-02-2008, 02:46 PM
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Default RE: 99 Expy blower motor resistor

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..

[IMG]local://upfiles/6756/0B230013186A411F9FC3A8F7EA508EC7.gif[/IMG]
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Old 05-05-2008, 08:11 AM
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Default RE: 99 Expy blower motor resistor

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.
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2006, blower, controller, eatc, expedition, fan, ford, high, motor, mustang, resistor, speed, taurus, test, thunderbird

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