Oddly enough my windscreen stopped working today as well. After a bit of frustrating bits of info here and there I came across a thread concerning a rubber grommet on the windshield actuator that needed to be removed. Not sure where that was on the bike so I kept searching and found this thread from October last year:
Click Here
Basically, I looked through the slots that the arms raise and lower the windshield, saw bunched up rubber on the left side and began moving it out of the way and lo and behold the windshield now moved. Ended up pulling the whole thing out including the seal on the other arms since it's all one piece figuring they would probably bunch up over time as well.
It's about a foot of rubber by the way and all one piece throughout all 4 arms so some cutting may be required if the decision is made to yank it out. The alternative is to take off the cowling and glue it all back as far as I can tell.
Anyway, as much as I panicked that it was a burn out motor or a blown fuse which I couldn't find, it was just this poorly designed piece of rubber blocking the windshield arms. Works as normal now.
Ian.