rescfrmn
Junior Member
Recently installed a UAS 8.4 with CarPlay. 2nd upgrade. 1st was a Harman 8.4 from 5" screen in a 2017 tradesman. The only issue that I have created is that I now have a subwoofer heartbeat thump when I turn on the vehicle. I can disconnect the lineout convertor plug on my amp and it goes away and begins to work again. But this happens each time I turn the vehicle off and restart it. Any suggestions?