Review on XtremeAmazing HVAC Blower Motor Resistor Regulator for Ram 1500 2500 3500 Grand Cherokee 4720278 68004241AA 68004539AA 973-020, A/C Air Conditioning Heater Fan by Chris Martin

I mean it's hard to tell how good this thing is from observation. But it works and looks even better than the OEM part. However, note that this resistance may not be the cause of your fan not working. I found that my problem wasn't with this or the fan motor, but with another underlying electrical issue that was causing it intermittently.