I have a 2000 Jeep Wrangler. I have checked the fuses, changed the resistor and the blower motor, and still nothing is blowing out on all for settings. I am wondering if I have a short somewhere or if I just change out the blower motor control switch. Do I also need to change the control unit or just the switch? And if I do have a bad connection or short somewhere, is there a way to trace it? Any suggestions would be greatly appreciated, as I live in Ohio and its a bit chilly right now.