I just wired up my boost gauge to the rear fog lamp switch as described in the instructions and all was smashing!! Worked a treat. The next night I found that it had gone out and the fog lamp was no longer working.

I've not had chance to check yet but i assume it's just a fuse that has gone? I'm just wondering becuase i would have thought that the fog light fuse would be a seperate circuit to the illumination of the fog light switch????