Sounds like it fried all the way to the fuse. check the fuse that runs to your acc. like dome light,dash light, stereo, antenna etc. If you can just put in a new fuse you will be lucky but you are gonna need to have the stereo re wired completely. get rid of any components that are not factory and start looking for someone parting the same car out and see if they will give you deals on the oem stuff you need. Id say start ripping out the junk and make it back to oem as possible then start your build dont try to cut corners it could land you with a burned down shell.