i think it might be a ground but not sure. the right side of my truck got nailed buy a deer, his head went into the wheel well then his *** nialed the door (he kind of swong around). after that the right blinker is kind of half on, on the dash but not outside on the truck and the blinker works but only the little one on the side, but not the the main front one if you cant understand what im saying ill use a pic.

 

Sounds like a wire problem. Check your wires and light bulbs.