burstner running lights not working

[tonyclaire]

HI all. Although i have managed to damage the new van twice since we got it ( "its only minor damage" did not go down well with Claire) we love it. The only slight problem is the two little external lights set into the sloped roof above cab and the two high up on the sides at rear do not seem to work. i think they are meant to come on with the headlights? Could this simply be a fuse? If so where would it be located? We have checked the fuses below the dash but not under bonnet as i thought they would be to do with the Fiat part of the van and the the lights in question are part of the Burstner bit.