Durango Blower Problem

Hello,

I have lost my highest speed setting on my '03 Durango. All others work fine. Does the high setting go thru the blower motor resistor or not? Do not know for sure, and would rather not have to deal with the resistor if I dont have to. Any help greatly appreciated.

Hope you got it fixed by now? High speed is wired through the resistor block, but, doesn't use a resistor. Voltage to the blower motor goes hot when you turn on the key. On and off and different speeds are controlled on the ground circuit.