my fan in my truck only works on 3 (hi), it does nothing on 1 or 2. The AC blows cold and the heat also works. Im guessing it would be the fan switch in the dash, so I would just need to replace the switch? Does that sound right? I thought either the switch worked or it didn't? I wouldn't imagine it would be a relay or some sort?

 

More likely to be the resistor block. Look around by the blower motor, should be a bunch of wires going to a plug, on a 'block' held in by two screws.

 

http://shop.advanceautoparts.com/web...RPSESWAMS_____

 

ok, ordered the resistor and it should be here Tuesday. Not sure when I'll get a chance to put it on, but I'll let you know what happens...thanks again for the help guys!

 

Do you heave to remove the blower to replace the resistor?

 

Shouldn't have to. Should just be screwed into the heater box... two or three screws, and an electrical connector.

 

finally got a chance to replace to resistor and that took care of the problem. Thanks again guys!