Thanks for taking the time for such a detailed response. The sockets are clean and the bulbs are new I'm going through the wiring for the tailights and cleaning all the connections as I go. One good thing is the tailights are brighter so I am getting something accomplished. I have switched the bulbs around and they both work in the right socket so the left assembly must still have a ground issue. I'm going out in a little while to work on it some more before the game starts.