I hope someone can help you, but Furrion is junk.
About a month ago in the very dry southwest, I inadvertently touched my Furrion active subwoofer and gave it a static electric shock. Out of the corner of my eye, I saw the power indicator light on the subwoofer go out.
I checked the fuse: good, I checked the 12v power going to it: good. Opened it up and found nothing obvious. It's fried beyond my capabilities.
The new Blaupunkt subwoofer was cheaper and sounds way better.
2016 Open Range RF316RLS
2018 Ram 3500 Cummins