I have a 2004 Dodge Stratus SXT. When I hook up my non-stock, sony radio, my car prnd3l lights all have boxes around them and my code reader gives me code u1055 which is a lost connection with the instrument panel. My radio works just fine but I unhooked it because I didn't know if it would harm my car
What is causing this and what is there I can do about it? Thank you for your replies.