For a while now both my 1999 Jeep Cherokee Sport 4x4 4.0 and my wifes 2000 Jeep Cherokee 4.0 2x4 have had the AC/Heater blower running on settings of 3 and 4 only. The lower settings would not work. Today,the blower seems to have stopped completely on the 1999 Jeep. I've researched the problem on line and everything points to it being just the blower motor resistor and not the actual motor blower. Does anyone have a thought about this?