The Remote wire nine times out of ten is blue. The smart way to do this is get a multimeter and use it to find a wire that it's on while the ignition is off and is on when the ignition is on (make sure that you are getting a 12 VDC when the ignition is on) The way that I have found works best is to disconnect the stock CD play and place the pins from the multimeter into the openings on the wire harness. Make sure you don't stick the grounding wire for the multimeter into the wire harness openings. I Hope this helps you out. Also you want to keep the ground wire for you amp as short as possible. This will help your amp perform better.