When installing a factory Toyota CD player in a 62, do I need anything more than the standard wires and antenna hookup? Is there a separate harness that connects (both ends) on the back for the CD to play? I get radio, but no CD. It says a CD is in, but it also show 'LOAD' on the screen (nothing plays). Any help is greatly appreciated. I was under the assumption that this was plug and play. Does the Scion radio require anything more? Thanks.