95 Jeep Cherokee heater problem

So I bought this 95 jeep cherokee SE with a non working heater. I took out the climate control and found a melted pigtail that goes to the fan speed switch. I found that the fan speed switch was broken so I replaced the switch and I cut the melted pigtail and just hand wired the switch myself instead of buying a new pigtail. So then the heater only worked on the highest speed so then I replaced the heater resistor. After installing the heater resistor the heater worked fine on all speeds for about ten minutes and then a burning smell came to me and it stopped working again. So again it only worked on the highest speed.(Burnt heater resistor). After some research, I went and bought a new heater blower motor and another new resistor. AFter installation, I carefully watched the resistor and after about 1 min its starts smoking. I have checked for continuity on the wires from the switch to the resistor and they all check out fine. I have checked for power at the wires on the resistor and power exists. Obviouisly there is to much current going through those resistors which causes them to burn but the heater motor fuse is still good and doesnt blow. Im purdy good at electronics and Ive been looking at the wiring diagram and I just cant figure it out and im running out of options. This is really frustrating please help?
SOME OTHER MAYBE USEFUL INFO that may be related:
1. The light ring around my ignition switch stays on all the time
2. My radio fuse was melted (but radio still worked) and kinda left corroded terminals on the fuse box.