full beam only working one side

hi my main beam does not work on the passenger side when main beam is on works fine other side but once selected the passenger side only shows the side beam nothing else bulbs look ok and wiring looks fine any ideas?
Have you checked fuses from under front light fuse box?
Please notice, in fuse box fuses aren't marked near-off-side nor passenger or driver side! :unsure:;)
Just normally left hand or right hand side! :LOL: