Changed one low beam bulb and now the other three don't come on, but when you turn on the high beams all the lights light up.
You may have a shorted wire going to the headlights. A technician can test all the fuses and check to see if the wiring is shorted to ground and diagnose the problem. I would look at the fuses to the headlight to see if they are blown and then go from there.
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing