All electrical shuts down 07 sahara unlimited

I was sitting at a red light tonight when all of my lights started cutting in and out. After a few seconds every thing shut down completely- radio, lights, dash, even the engine died. Came back on quickly and I was able to start it no problem. I'm at a loss here because now the brake indicator light on my dash sporadically lights up and chimes and then goes away. Really hoping this is something I can fix on my own