I swapped a uconnect 5.0 into my truck just about a year ago. Several times no I have had this strange issue where the sound will quit working. Everything else on the radio appears to be fine just no audio, no volume bar when I twist the knob.
This is from when the first time it happened.
https://www.ramforum.com/threads/2013-2018-ra2-vp2-na-radio-notes.87900/#post-1657310
It eventually fixes it self over a couple days time. Since this has been happening I bought a spare radio in case it doesn't fix it self. I tested the spare when I got it and it worked so I put it in the closet until I needed it. Now the issue has arose again so I went ahead and swapped in my spare. The spare is showing the same condition with the volume. Which leads me to believe the issue is on the truck side not the radio. I have checked the wiring diagram but I don't see any amps or anything that could cause any issues. I took a short video showing what the radio is doing. I would appreciate any input on what might be causing this. Thanks.