I have a 2009 Saturn Aura XE that I'm trying to put a new radio and subs in. I've connected the harness correctly and it doesn't power on. I know I have the correct one because the other one activated the security system. The radio I'm installing is the Pioneer AVH-X390BS. I've already tried grounding directly to the chassis and the stock radio still works so I don't think I blew a fuse. I'm out of ideas and would rather not spend the money on getting it installed.