@BAD LUCK DUCK Afraid I have kept quiet up 'til now as I don't like offering advice from a distance when I can't get 'hands-on' with the problem and any advice can be lost or become confused when passing over the internet. I fee that it might be an idea to point out something though that might be worth looking into.
Before your bike went dead you had been re-jigging your wiring loom around the front end of your bike at a time when the weather was, shall we say, rather inclement. I wonder if it may be that you are looking in the wrong place on your bike for the problem and, just perhaps, the problem lies in one of the connections around the front end of the bike? It is entirely possible that a solder joint or connection that was just holding together could break due to water freezing, expanding and breaking the connection. The first rule of trying to solve a problem is to thoroughly examine events prior to the problem to see if there is a connection (cause and effect) between them and the problem even if it seems to be in an entirely different area.
