[embee]

If your original problem is that the brake light isn't operating with the front brake switch, the most likely cause is the switch contacts are dirty. This is a quite common issue, they tend to suffer some slight arcing when make/break is experienced.
While the switches aren't intended to be serviceable, you can usually get them apart, often needing to pare off the plastic rivet heads and then carefully prising the halves apart. Clean the contacts, reassemble and refit, the fixings will hold them together. My SV and Deauville have both had this done.
The easy alternative is buy a new switch, generic ones are around a fiver.

If your problem is something else, please ignore this post.