(Cable Adapter)
Mine doesn't work. I think you may need an adapter ?connected to the media center or audio player that is installed.
Mostly depends what audio device is installed.
I will find a guide an post again soon to the area this cable is.
Here is part of the troubleshooter that says if isn't working to disconnect and (Check Resistance)
Most likely why its not working.
Good luck with getting the steering controls to work.