Re: heater blower motor problem
I second that! It is sometimes also called the Block resistor.
Once you see it and get it out you'll understand how it works. It is block of 4 different sizes of wire (or however many setting on your fan switch) that your switch routes current through to the motor. The small (or larger) the wire the slower (or faster) the motor turns. It sits in your duct work so that the passing air will keep it cool.
Make sure you can get the wiring harness off the block before you go to the dealer (yes - sigh). Often times the harness welds itself to the block because of all the moisture in the duct work, so you may need a new harness. If you go to the junkyard, cut at least 6 inches up the harness and take it with you.