I have a sirius xm(button only not actually sirius xm),am,fm,6cd player now and am going to try and add Nav and xm. Have purchased a working radio with all of these accessories there. At first I thought that I could just plug the new radio in and play. It doesn't seem that this will hapen. So far everything is Honda. All components are Honda. Are there harnesses available, from honda or other places, that will aid in this conversation.