Cab Speakers - No Sound

[Eagles8]

Hello all,

So I have been doing A LOT of reading on this forum and I can’t seem to find the answer to our specific problem. We have a 2018 Seneca 37FS and we have had our share of frustration with the Garmin/Fusion system. But thanks to this forum, we have successfully updated both the hub and the remote. All seems to work fine... except for music over the speakers. They work when we’re plugged into electricity, but on the road we get no sound, as if it’s on mute. We can see the songs playing on the screen via BT and the radio station if we are on the radio, but no sound when we are on the road. Anyone have this problem? Any fixes that y’all can think of? Thanks in advance!