In stead of blowing out your headlight motors you can install wig wags. It’s a unit that you wire into your headlights and it’ll alternate the flashing of your lights.
The unit:
http://www.swps.com/headtailflas.html
In action:
http://media.putfile.com/Strobe-Lights (without the red and blue strobes)
They are emergency lights and you do need a permit for it, but you don’t need one to order them…