by Knowledge » Mon Oct 01, 2018 4:38 pm
It can be done, but it is not much fun.
Before you start, buy some brass micro-tube from a model shop (or on-line) to replace the brass tube you are about wreck while taking it apart.
Drill out one end of the existing tubes carefully, and you should be able to pull apart the switch. Unfortunately, at this point, the entire contents of the switch will fall out and you will be left puzzling about where they came from/where they go back. Fixing the broken wire will be the least of your worries.
During reassembly, have some of your newly-purchased tube cut to size. Flare one end before inserting it into rebuilt switch housing, and then find some way of flaring the other end of the tube whilst holding everything in place. An extra pair of hands might be useful ("when I nod my head, hit it")
Sorry if I sound a bit pessimistic, but this is one of my least favourite jobs, and I would rather spend the money at Scootopia on a new switch.