btw the stock radio doesn't have a ground WIRE. it's grounded through the frame so make sure the metal mounting brackets are securely mounted to the chasis. i halfway installed my stock radio once when i was in the middle of doing something and had to drive somewhere and the electronics were really screwy the whole time. a lot of the accesories are connected to that harness for the radio and if the radio isn't grounded it screws up the other electrical systems as well.

-marc