What fues controls the signal lights and radio and heater of a Jeep Cherokee Sport?

I don't know which fuse those are but. I don know most of the time I have all of those out at the same time my igntion switch has over heated and needs to be replaced. After many many times of changeing the switch I put a relay in there that runs the power and konw that wire on the switch is the signal. Haven't had that problem since.