Last part of the mystery. So if I plug my old nav head unit back up, it works. Of course the screen is dark and I can’t change the station, but I get static from the speakers and can adjust volume.
I’m at wits end.
Well after doing the entire NAV delete on my LX470, still no sound. I have tried all of the various harnesses. The amp appears to spin up and turn off. I guess I'm going to put it all back. I'm super disappointed.