I have no control of the heat or radio heat is stuck on defrost and the ac is on I've tried touching the battery cables together off the battery of course I let it sit overnight like that did not solve any issues I still yet have to check the fuses it's just been to cold to do that and I've checked online there are numerous people having this problem why does this happen and how to fix

When i turn my headlights on, my speedometer, A/C & radio turn off