Turn Signal Troubles

Thats funny because both happened at the same time... Yes I did replace the TS switch. Nothing is new all worked a month ago. You give me things to check like connect and disconnect plug but nothing changes buts what does happen is when the rear harness is hooked up and TS disconnected And I hit the Brakes the Right Rear does not light.The left does. I thought maybe with all the testing you would tell me the that the wire from here to here is bad. Not just keeps pluging and un pluging things.