Headlight Switch Schematic

So I spent some time ohming everything out and I had continuity where it should be. I decided to plug back in the headlight switch and mess with it a bit. After pulling hard on the handle I got the headlights for a moment then some arcing noise and then it all went dead. Then I'd pull again and more arching and everything came back. I started feeling around and found that the b1 wire on the connector was hot. Which makes me think it's drawing too much due to something or other.