I hope someone can shed some light on my problem that has me stumped. I have a 1974 charger and the other day the turn signals stopped working, i found a blown fuse and replaced it. i turned the key to the on position and the signals worked. Once the car is running the fuse blows. I replace the fuse again and put the signals on again with the engine off and they ran fine. as soon as the car is running the fuse blows. Anyone have an idea what to look for? I'm stumped.

Thanks