I have a manual gear box hence my lack of knowledge on autoselect.
I do have an ashtray light and only replaced the bulb t'other day so, yes, could take a
feed from there.
Many thanks for the rheostat info
Just a thought though - could you move the switch and the rheostat of the mounting board that comes with
plasma dials and put them onto existing blanking plates/thingies?
BTW I know nothing about autoelectrics. I know about computers and they are much easier to understand than autoelectrics IMO.