Ok, was in the middle of plowing the driveway and the light on my Original went out and since I only have one headlight, I kinda need it. Pulled O' into shop, checked fuse and it was blown, bulb was blown too

. I replaced fuse and bulb and blew 2nd bulb but not the fuse


. I don't have a mutimeter, I know I need to get one and will in the next week, but I do have a 12v testor similar to this:
http://www.basspro.com/webapp/wcs/st...ing_googlebase
Any ideas, seems like I'm having an amperage surge, maybe replace s/g??