hi I know this is a old post but I am currently having the same problems on my 1992 plus 4 no dipped beam so removed dim/dip unit, it was then working for short time then no dipped again took the car to a auto electrician and he has found the column switch /stalk has melted so have ordered a new one from Rimmers to arrive tomorrow.
So do you have any more info re the extra wire and how did you bend the stalk to miss the dash without snapping it
