I think its the ballast. Do the lamps move generally? I think no.
The lamps you are telling about not working I think are the small, yes? A friend of mine has Hella and he had the same problem, he went to an electrician and thats all.
The lamps you are telling about not working I think are the small, yes? A friend of mine has Hella and he had the same problem, he went to an electrician and thats all.