Headlight low beams not working.

[Arkbird443]

My headlight low beams are not working. I replaced the switch, and they worked for a bit then stopped working again. So I replaced the wiring harness and made sure that was right and it still doesn't work. Toggling the brights or just flashing them doesn't work either. The only lights that work on the front end are the parking lights and the fog lights. New switch, new wiring harness, still nothing. Please help.

Edit: it is a 1999 XLT 4wd sohc

 

[abcducati]

I came across your post while looking for a solution to the same problem on my '04 XLS 4.0L. Did you ever figure out what the issue was? In my case, the bulbs, fuse and high beams all work fine, it's just the low beams.
How you got it fixed.

 

[rasouth]

Did you check the relay or the fuse. Those are the only things I can think off that would effect both lights at the same time. Maybe the ground?