I am wanting to put a honda navigation system in my 2009 Fit Sport. Can anyone help me with what I need for wiring diagrams or wiring harness. Was not sure if my current wiring harness would work for the factory honda navigation radio. I brought a honda factory radio from ebay..can anyone tell me how to decode the model number? 39541-SWA-C010-M1 Also, does anyone know if this has a built in amp or requires outside amp? It is a 2006 model nav. unit. Not sure if it has voice command. Does the fit sport have a seperate amp with factory radio or built in? Has anyone else tried putting the honda nav radio in their fit? Can I add steering wheel controls using the current steering wheel cable reel?