Tonight i went to circuit city and bought the install kit,wire harness, and antenna adapter. I got home and hooked the harness up by crimping all the wires together where they belong (i.e purple to purple, gray to gray, etc.). I plugged both ends in and no power. The hu wont even turn on. So then i plug the stock radio back in and it works fine. So i tried messing around with the constant power, and the ignition power, but no luck. It is a Alpine cda-9815, anyone can help me out here? I might just take it somewhere and cough up $40 bux, if i cant figure this out.