Jeep Repair: AC, jeep cherokee classic, blower motor resistor

Question
I have a 1999 Jeep Cherokee Classic.  The AC worked great up until a week ago.  When I turn on the AC it will only work on speed 4 (high Speed) 1,2,3 don't do anything.  The air blows cold but the fan speed switches except for 4 are non working.  I bought another temp control switch and connected it and it does the exact same thing.  Please help

Answer
if u have auto temp control u will need a blower motor resistor module which will have a new harness and the dash will need to come out for it to be replaced.
If it is normal ac  not auto  a resistor is all that will be needed. I live in Atlanta and this sorta job I can do on the side for less then a dealer or shop.