Headlight Switch Cranks Engine??

I have a 1970 green Dart, and the left turn signal indicator comes on when the lights are turned on. Then outside the car, at the same time, the right turn signal is on! But when you're driving, the left signal flashes real slow while the right one works normally. I think this is due to the the fact that the cars were painted green from the factory. Different color cars like blue or red or yellow don't have these kind of problems. Get a different colored car, and the problem will go away. LOL