I'm gonna have to agree with ya joe.
99 % of the time, when something fails, I find a problem in the area I was last working in.
So in this case, I would check around the areas you were working with... mainly the handlebar region and areas around the transmission cases where wiring enters/leaves.
Make sure everything is snug and all the wiring is intact (no open shorts, etc.).
A multimeter with a continuity tester on it will be a godsend in this case. Troy probably has access to one, but if not, you can get em for between 10-20 $.