Alright so i was going to install my radio today and found wires under my dash that had been cut... i dunno from where, and a black corroded ground wire just fell out when i put my hands on it. The cut wires were connected to a "bosch" piece, and i have no clue where the ground wire came from. I've been having no speedo or odometer which i attribute to a bad vss, and a check engine light, but when i try to pull codes the CEL just goes on and stay on no flashes. Also i plug my new radio in after a long ass time figuring out how to get it out, and its not getting power!!!! So i guess i'm wondering why won't my CEL flash like its supposed to? Why may the radio not be powering up?