Headlights aren't working!!! on 2001 Toyota Corolla

The headlights on my 2001 Toyota Corolla have stopped working except for the parking lights and the highbeams. How do I fix it?

Asked by for the 2001 Toyota Corolla
A diagnosis of the headlight circuit needs to be performed. You'll need a wiring diagram, voltmeter and the ability to use both of them properly.