Aftermarket Radio Installation
I am trying to install a aftermarket radio, a Kenwood 252u, and have gotten the after market wiring harness and antenna adapter. I have it all hooked up but have not sound. Every other feature seems to work fine. Also there are two other connectors on the back of the radio. One is a small adapter and the other is a multi prong shielded ground. What are these for and is there some reason I can not get sound that might be unique to BMW's. I have done installs before and never had this problem and since there are more wires on the after market connector than on the car harness I am confused.