My 03 F150 is having headlight issues. My low beams work and so do running lights but when I flick high beams on all headlights turn off and my running lights still work. I replaced my multifunction switch on steering column, looked at bulbs and they are still good, and also made sure I have power from my wire conception to the buld. What else could I do?

 

Can both translate that to English and also tell us what you were checking?