I have a 1996 2500. Recently my left turn signal stopped working or so I thought. It works during the day but it doesn't work at night when my headlights or running lights are on. When I turn on my left turn signal my four way flashers come and the dash lights flash. Also when nothing is on when I hit my brakes the dash lights come on. I'm running out of ideas what it could be. Check all my fuses and bulbs and they were good. Does anyone have any other ideas what it could be?