Is there power at the fuses? Next, there is a low beam relay in the under hood distribution box. If I recall, the relay for the low beam is integral and I don't believe it is replaceable itself.
Take a look below. I cut a portion of the schematic for you to see what I am referring to.
If possible, check that as well. Also, confirm there is power to the fuses related to the low beam.
If these things check good, we will need to check the switch as well.
Let me know,
Thursday, February 13th, 2020 AT 6:30 PM