Just Installed a new navigation system and indash flip screen dvd unit. After putting everything back together I find that I have no rear lights at all. No brake, reverse, turn signals... nothing.... completely dark. I had to tap into the parking brake wire for the nav and dvd systems to work is it possible that I blew a fuse or something??? Is there an electrical diag available somewhere that I can download??? Heeeeeeeeeeeeeelllllllllllllllllllllpppppppppppppppppppp!!!!!!!!!!!!!!!!!