Wow, that was helpful and insightful all at the same time
Yeah, you'll get some of that sometimes. I see you're new here, welcome. If I could help you with your issue I would.
Try adding some punctuation to your inquiry help with readability, and as much detail as possible. If you haven't already, try searching, most people are able to find past answers to more common issues. I have not seen this particular issue buy someone who has might be along to help. There is lots of experience here.
Assuming that the volume controls are not working let's start with:
Does the knob on the radio work? Turn off and on? Menu and selection buttons working or not? Do the steering wheel controls work?
If nothing is working, it might be an issue with the head unit itself.
Also, how long did you disconnect the battery for? Leaving it disconnected for a longer time might work (couple of hours?).
Otherwise, that's all I have. Be patient, it's likely that some others will chime in to help.
'76 CJ-7, '43 CJ-2a, '78 Bronco,'78 CJ-7, '75 CJ-5, '78 CJ-7, '80 CJ-7, '78 SJ, '79 SJ, '78 and a '76 FJ-40 , '90 XJ, '91 XJ, '86 CJ-7, '95 ZJ, '68 CJ-101 Commando, '00 TJ, '68 M-715, 2 '86 Military Blazers, '96 LR Discovery, '86 CJ-7, '91 YJ, '99 TJ, 07' JKU Rubi, 1988 YJ, 1973 Commando, 3 Diesel Excursions....
Now back to a 2013 JKU Rubicon with "stuff", planning 37's with minimal lift.
I've tried them all... Jeeps are still the best. (0||||0)