well for one if u are trying to get the parking wire to work it would work if u put on a ebrake, u have to take the wire and ground itout rapidualey like 15 times and than hold it to a ground and the blue screen should go away, i know u can go to brands mart and the dude there named daven will sell u the code for 10 bucks, that will work on all the headunits u need.