Thanks all,

I did find the module, it's below the dash on the heater/AC box, just to the right of the light mounted under the dash.

You have to remove the cover under the box, the cover protects the vacuum cylinder that opens and closes a vent down there. The resistor unit is mounted thru the housing with 2 screws. It is easily found, it has a connector with a bunch of wires. I spent sometime on the internet researching the unit. What typically goes bad in them is a 'thermal fuse' not to be confused with a current fuse that blows when you draw too many amps. This one blows when things get too hot. Mine had a bit of trash stuck inside that probably reduced the air flow causing the 'thermal fuse' to blow.

The bad part is, Auto Zone and Advanced want about $50 for the part. So I am looking on line for a 'Cost Effective' solution.