Hooked up My iPhone 4 to My Pioneer Head Unit.
My newest mod to my car was to hook up my iPhone 4 to my Pionner AVH6800. I did it for a few reasons. Just in case I wanted the people in the back of the car to check out a Video. I could you hook up my phone to my head unit and they could view it. It was really easy to set up.
1. I Jailbroke my iPhone and installed Display Out via Cydia.
Display Out shows evey that is displayed on your iPhone on other screens.
2. I bought a APPLE COMPOSITE AV by Apple. I paid $20.00 a few months back. The cable I bought was OEM.
http://www.amazon.com/gp/offer-listi...condition=used
3. Hook up the coonections to your Head unit and your all set.
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http://farm7.static.flickr.com/6087/...741892c5_b.jpg
http://farm7.static.flickr.com/6061/...819359ff_b.jpg
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http://farm7.static.flickr.com/6137/...4376e10b_b.jpg
Just in case you wondering. You can Only control the sceen by touching the iPhone. You cannot use the Pioneer touch screen.