Free Wiring diagrams?

[vice24 0]

Does anybody know where I could find some free wiring diagrams for installing car stereos? I install a lot of aftermarket cd-players for my friend because he owns a car lot and having a website that would show me what is what would really speed things up. I am about to put in a DVD screen into a 2001 Caddilac Deville and was wondering if anyone knew where i could find the diagram for the speakers wire colors. Any help will be appreciated. thanks

[Acidburn 10]

www.installdr.com has some good info

[Supa_c 1]

http://staubtech.com/

You have to be a member, but it has just about everything you would need for diagrams.