That is better than them being folded away.
That was fuse "E" that you changed ?
Since you checked the fuse, you may want to check the switch.
Try flipping it back and forth a few times.
Maybe you got water in it when you washed the scooter ?
Life isn't easy.... the mirrors are connected to a Back mirror controller,
which is powered by the fuse "E" through the position switch.
But there are 2 other wires associated with the controller.
I would try to locate the mirror controller and inspect the connectors that hook to it.
Perhaps there is a connection problem there.
I do not know where the controller is located.
There is a table for the resistance values for the connections on the controller. (page 19-7 in the service manual)
But I am unsure how to read it.
Maybe the best is to wait for a breezy sunny warm day and hope that an hour in that weather will cure the problem.
Good luck, and let us know if you find a solution.
I have a manual like this:
http://www.ebay.com/itm/Kymco-Service-Manual-Grand-Dink-250-/230813766233?pt=Motors_Manuals_Literature&hash=item35bd929259&vxp=mtrScoot safely,