Sadly i have no clue as to going about this. I purchased everything I thought i needed but something just doersnt seem right. I have a 2006 ford five hundred with a 6 disc changer and i just want a basic way to hook up the amplifier to the existing stereo. I unhooked everything only to realize that i didnt need half of the stuff i was sold. Wiring harness, dash kit etc. If someone can give me a basic guide as to going about this procedure i would appreciate it. also, since i unhooked and reconnected, it now says cd error. If anyone can help with that as well i would appreciate it.