I put a new radio in my car awhile back. The problem I'm having is the cd, aux, and usb dont work only the stereo portion works. I followed the instructions as best I could. But the car had duel decks cd lower and radio upper. Do I need to combine the two different wiring harness to get full function? Or is it possible I bought a bad deck? I only used the upper wiring harness. I figured it had memory power, on off power and speakers that would do the trick?