My volume control button and the call hang up button on my steering wheel in my 2013 Edge used to work intermittently and then a few weeks ago they completely stopped working. Tonight, I took it the old one out and replaced it with a brand new OEM switch cluster. I put it all back together and the volume button and call hang up button still don't work. But the SYNC voice command button and everything else in the switch cluster work. Anyone have any ideas as to what it could be? Maybe bad wiring or a loose connection? I'm at a loss for what it could be. When it was all pulled apart all the wiring appeared to be fully intact. Any help or advice would be greatly appreciated!