On the left side of the steering head, there is a rectangular metal hoop that retains a main wiring harness. The turning of the handlebars continually flexes the harness at this location and it's a common area where the wiring insulation wears through and causes a short. It happened on mine and was a simple repair. I just taped up the worn insulation an installed a $3 automotive harness cover.
Here is a photo. (sorry, not the best photo, but you get the idea.)
Check here first. It may save you some $$$. The lowest ribbed thing is the harness cover.
Good luck.
:2tup: