What part of East TN? I live in Western NC, lol.

That could be a couple of different things. It's most likely that your batter is older and dying out. When a battery starts to die like that, your alternator will divert power to the more necessary functions. For example, if you're braking for a traffic light while your radio is on and your radio dims out or goes off completely because the alternator is diverting electrical power to your ABS braking system. Get yourself a voltmeter and check the charge on your battery. It might need charging.

Alternatively it could be a wire grounding out or your alternator, but an alternator is least likely. Usually they either work or they don't. My guess is your battery is dying. You can usually get them checked at automotive stores for free, if you don't have your own voltmeter.