i need to change mine because the blower motor will only run when the switch is on high. i understand that is because the "blower motor resistor" is bad (the resistor unit with winding coils on it). i know what it is and what it looks like, and i was told its on the back of the blower motor. can you get to this under the hood? if yes, where is it exactly?
You need to take off the blower motor to remove the resistor. The motor and cage are attached to the firewall on the passenger side.
I don't know where it is on the Expedition, but on my '92 Explorer it was the diode that burned out. Cost 50 cents for a new one (and some soldering). I'm still not sure what the diode is for...
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