Driver side low beam bulb failed. Driver side and passenger side high beams work. I replaced both low beam bulbs and now the passenger side high beam does not work. The driver side does work. I checked continuity on the passenger side high beam bulb and it checks ok. I switched high beam bulbs between passenger side and driver side and the passenger side bulb works fine on driver side. Passenger side still does not work. Could this be a bad relay? Any recommendations or troubleshooting ideas?