Hey guys. I'm new to the forum and been looking around about new head units. I have some good knowledge as is for replacing them but as new time comes so does new stuff. So I own a 2007 wrangler x. Two door and just want to replace the head unit with a nice nav, DVD one from eclipse. Clutch field is saying I need a PAC adapter. Do i really need this adapter or can I splice it into the other harninesses.? I'm only changing the HU. If they matters?