Just put in a new Kenwood head unit and I have Pioneer 4 ways in the back with the stockers in the doors for now. Just before the new head unit went in everything was working fine. Now the rear speakers don't work at all. I have the adapter plate and harnesses and everything is hooked up correctly. A couple things I noticed. The black speaker connector was wired strangely. It wasnt hooked up to the stock stereo at all. It instead had both right side speakers looped together and both left ones looped as well. Again, no direct connection to the stereo from the black plug. And the other is that the new stereo is working fine on all 4 outs. I can hook the rear or front wires to the front speakers and they will work but not vice verse. Any thoughts?