2019 LGM. My left tail light works as a tail light but not as a turn signal or hazard light. One of the contacts on the 7 way plug was really ugly so I replaced the plug but to no avail. I need ideas on where to start toubleshooting. The car lights work normally and the right tail light also works normally. I had to remove and reseal the left tail light several months ago due to a water leak into the basement but it worked after I put it back on. Could the water have caused a partial failure but not immediately? Not good driving without a turn signal, especially the left; also illegal.