Stereo problems due to a sun visor problem

So I posted about this a couple weeks ago and the problem was that my sun visor had been lose for a while and one day I was driving and it fell so I decided to unplug the wires on it and when I did my stereo went out, my check engine light came on, none of my interior lights work, I cannot lock it with the button on the door, and when I turn it on the needles start moving back and fourth a couple times before it starts, I checked all of the fuses and I only needed a 10 replaced so I did it and the problem hasn't gone away, I recently replaced my battery for the OEM one straight from the dealer because of another problem and now Im not sure what I can do to fix it, anyone else have this problem? Thanks