Plugged in a small microwave into an outlet that was working with no problems. Heard a slight noise and unplugged it. One of the prongs look a little burnt. Now outlet does not work. I checked all the outlets with the breaker off and found 4 on that circuit. 2 work, 2 do not. I disconnected all wires from these outlets and turned breaker on. Outlet #1 has 2 pair of wires 1 has power the other pair I found by using my Ohmmeter feeds Outlet #2. #2 only has one pair (end of run?). Outlet number 3 has 2 pair. 1 pair feeds outlet #4 (verified with Ohmmeter) which only has 1 pair. The other pair in outlet #3 has no power. How do I find what feeds the power to #3?