I have had a decent amount of audio upgrades done over the years. Unfortunately, I am not well versed in auto electrical systems so I have paid installers to do things right. A recent dead battery was replaced by a third party with an Optima Yellow Top. However, the folks that replaced my battery seem to have re-hooked up my connections all wrong.
My head unit initially turned on but the volume control did not work, I could switch between the other features but none of them produced sound either. I promptly removed the detachable face. Today I tried again and now there is no power to the head unit whatsoever.
Thoughts on the best way to resolve this issue? I'm guessing I will have to find a local reputable audio place to take a look... Possible short due to a detached ground? Something else messing up the flow of the circuit?
Appreciate the time and any suggestions!