Power to the Motor Blower Resistor

Started out with the heat/air not blowing from the vents. You could hear it kick in, but no air would come out. Would tap the blower motor and it would start blowing out like normal, so thought it was the blower motor. Then, the guy I bought the car from said that it wasnt the blower motor, that it was the blower motor resistor and that it had been that way for 3 years. He said that the guy he had work on it didnt have the right parts so he had rigged so that each of the 5 wires were plugged into seperate prongs instead of being connected. So, he unplugged it and plugged it back in and now I'm not even getting power to the resistor. My question is, where does the resistor get its power from? Is there a relay/fuse/module? And where would it be located? Any other thoughts or ideas? Could something else have been unplugged and not reconnected? Any idea of a rough price estimate if a mechanic works on? What about doing it myself? Located in Tennessee. Thanks