Can anyone please assist me with this problem? I have no electical current registering at any of the high level marker lights and have tried to locate the fuse to check if this is the cause but cannot find one. I have a Compass Comodore motor home on a 2.8TD. Mercedes 312 sprinter base. 1998 model. I cannot say for sure if these lights have ever worked as I have never driven at night. I have had the vehicle for 18 months and it went through the MOT on April last year no problem although I didn't check the lights then. It was only when I happened to check them for this years MOT. that I discovered they were not functioning at all. Would be gratefull for any help.:Sad: Yours Henderson.