The resistor/motor is located beneah the glove box at the firewall. To access it you will have to remove the lower right air duct which is fastened with a push clip. Laying on your back you will see two heavy
wires and a few smaller wires terminated into two
connectors. These connectors are the resistor connection. Unsnap them and you will have access to the resiator two screws whic are difficult to remove but with some a little effort it can be done. Usually it is the third resistor out of the three in the assembly that is bad.
Hope this is of assistance.