Ok, I think I've got it. I just learned something new and I believe that the problem to you headlights is that there's excessive resistance. After playing with a headlight circuit board, I discovered that if there's no Ground to the low beam, it won't light up. And I turned on the High beam, it was a little dimmer than the other. So this is what I'm guessing.

According to the wiring diagram, the Low and High beam bulbs share the same Ground on each side. So if the Ground wire is corrodded, loose, or etc, it'll cause the Low beam not to light up. And with that, it'll cause the High beam to light up dimmer than usual. This is because of excessive resistance. The current going through the High beam bulb will look for Ground, and since there's no ground, it'll go through the Low beam's bulb back to the relay and find a ground.

Does that make any sense?.. Hope so. If not, let me know..

Oh.. And to the moderator.. In the Automotive World, there's only two techs. One is Bubba. He/she will keep replacing things until it works. The other is a Tech.. He/she will look at the problem and take an analytical approach..

So when I refer to something as being Bubba, it means don't do it.

Prime example of Bubba at work..
Hmm.. I keep blowing a fuse.. Why don't I try another fuse. Hmm, blown again?.. Try a bigger fuse.. Still doesn't work. Let's check the Starter.. Oh, and the Tire Pressure too..