Thanks. Problem is that I can pull about one foot of cable through the hole in the ceiling, but it then goes taut. So can't get at junction box or transformer - hence question about access. Work was done about two years ago (before I moved in) and looks professional job. I guess what I want to...
Yes, have tried replacing lamps and also moved bulb holders around. Is always the same location which lights up, whichever bulb or bulb holder is there. I do have multi meter. Any other ideas welcome.
Only one of four 12 volt spotlights working in bathroom ceiling. No access from above so only access is the small holes where bulbs fit in. Looks like wiring was done and then plasterboard and plastering done afterwards. Is that likely and do I have to take ceiling down or am I missing a trick here?