Kenwood Z-727 CD Player "diagramas radios" Questions

Premier DEH-59 Pioneer CD reciever I have an older Premier DEH-59 reciever that i want to locate a free wiring diagram of the connections on the back of the radio\ Any help is much appreciated. If you

JVC KD-SX770 Just got a JVC KD-SX770 car cd player and hooked it up and everything is fine except when I try to put a cd in to play the display shows please eject. I have tried other cd's in various ...