Hi guys, My headlights not working it states a bulb is blown, but it’s not the bulbs, I was told it’s a ballast, but purchased a ballast and that doesn’t seem to be the problem either, it was initially one light not working,, but now after a guy (auto elec) looked at it both lights are now not working, it seems to be baffling the auto electrician has anyone come across this problem before ? Thanks in advance