The same thing happened to me,one signal worked and one didn't. To fix this you will need to replace the "clicker". Stick your head under your dash on the drivers side right up under where your left knee would be if your seat was really far forward there is a silver thing about the same size around as a quarter it is near some other fuses. it will say 12 V on it. it will cost you 1-2 dollars for a new one hope that helps.