I'm looking for the wiring schematic or diagram for the cassette deck in a 92-94 Suburban. My cassette deck doesn't work right and I'm trying to build an adapter to connect to my IPOD. I know there is some kind of "line-in" connection from the cassette deck to the radio module. I just need the schematic or wiring diagram. I've searched here and everywhere else I could think of and found nothing. Any help is greatly appreciated.