My 2009 XF did not come with a nav unit so I bought a used one on E-bay and connected it to three supplied connectors in the trunk. The GPS unit recieved power but nothing registers on the display. It is also missing the orange wire connector to the GPS unit which I believe may be an antenna wire, but I am not sure as none of the harness wire connectors are labeled on the GPS. Does anyone know if what I need to do to get this Nav unit working.

Thanks in advance.

 

I think you're out of luck. I believe a different body wiring harness was used in the models with a factory installed Nav system making a retrofit of the Nav to the other models impossible.