Why my jeep keeps cutting off while driving. Sometimes when I come to a stop

I recently learned about a common problem in this year model, I had to replace all my electrical before I learned. There is a computer box on the firewall behind the coolant resivouir. The connections on them loosen from vibration and they start to gap. It will stall out and die for no reason. I bought a 2 dollar zip tie and temporarily fixed it.