Instrument plug in ,pin repair

Just finished wiring my 68 Dart. Pluged in the insruments to check them. Everything was ok except my right blinker wouldn't blink. Bulbs good, I have power to plug in. When I pushed on the plug in it would blink. I pulled the plug and noticed that the pin was loose. What is the best way to resolder the pin or is there a better way to do this.