Just come from the loft....checked out transformer as you suggested no power from 12v output, changed transformer.....bingo..fan AND lights.
Thanks again
outswinger
Can anyone advise please? We have four 12v 35w spots in our bathroom connected to an extractor fan. Pull the cord, both fan and lights are activated. Fan is still working lights aren't. Is this a transformer problem? (output 12v/150va) The bulbs seem intact and there doesn't appear to be any cabling...