[Jessie, UK manufacturers? Are you referring to Lucas, the "Prince of Darkness"? heh heh heh Having owned an MG and a Triumph (the car not the bike) I think their biggest downfall is the electrical sustem. Forget if it's positive ground or negative ground.]

Its negative ground. I have owned both Triumph bikes and cars. I now have a 1964 TR-4 that I have had for some years. It is much like the almost new TR-4a that I scattered over most of a Georgia county 10 days before I left for Nam.

Yes, most of the older Brit stuff had the 3 position Lucas switch: off, flicker, and dim.

jess