My 1992 (M16) plus 4 failed the MOT because of no main beam on drivers side head light. New bulb - no good, checked the fuse and this was OK but there is no voltage on the feed in the head light. I am trying to trace the wiring and I suspect a relay somewhere but can only find two, one being the fuel pump and one beside that which I swapped out for a spare on the off chance - no go. Has anyone had this problem or are there any ideas.
