Forgive for my English, I use an online translator. Has established to the client in grand prix 1997 Pioneer AVH-5300DVD. It wants that buttons of management on a rudder worked and has bought the universal adapter. But I cannot find a wire going to radio from buttons on a rudder that it to connect. Who can help? In advance thanks.
P.S. The adapter here such
http://caraudio.in.ua/published/publicdata/CARAUDIOWASS/attachments/SC/products_pictures/v7%200_enl.jpg