My car came with Rear Entertainment System (RES) and JBL. I changed the JBL and love my new stereo. Anyway, RES no longer powers up. Not sure how the RES and JBL were interconnected. I dont really care if sound plays through the stereo/speakers since the kids can use headsets but I do need it to power up. Does anybody have a wiring diagram or can anybody tell me what to connect to power for the RES? Thanks.