HELP My lights dont work

[panesar_e30]

as title, the other day , went to top the cab with petrol, on the way there the lights were fine then all of a suddon the headlights went off, tried turning off and on again with no joy. the indicators, hazords or nothing works.

the dash seems to light up but indicators show they are on and so does the main beam.

iv checked all fuses and relays but no luck.

can any one help or sort it?

thanks