Wiring Diagram For IPhone 4/4S Charging Port

[slowride326]

Hello,
My questions is what is the wiring diagram for the IPhone 4/4S, for the sync/charging cable that plugs into the IPhone. I am wanting to build my own cable, and I need to know what each wire should carry and trigger. For instance when you plug the iphone into your car, it pulls music library, sounds, and even video. I need to know how to pull everything possible from Iphone to a external source.


Thanks.