Audio Systems: stereo fitting in ford Windstar, 1995 ford windstar, sony cd player

Question
I have 1995 Ford Windstar, now I wanna fit Sony CD player in that, there is no music system fitted in the van, just some wires hanging out. I'm very much confused about the color coding of wires? i.e. which is speaker? which is ground? which is power? so pls. some one help me out
thanx

Answer
the way i see it, you only have two choices, first, order a factory manual, not the ones available at auto parts stores that includes wiring diagrams, second, take it to a good autosound dealer/servicer and let them do it for you. for the price of factory manuals, you can probably get autosound dealer to do it. sorry, but there's no way i would know your wiring color codes.