lowbeams

For some reason the "lowbeam" headlights are not working. I was told that the lamp for "low" must have burned out. So, I got new lights, and replaced them. They seemed to be working, but then later the first night they went out again. High beam works fine. Low not working. Anyone know...

Here are the symptoms: 1. Both lowbeams do not work. 2. Both highbeams work. 3. I did a continuity test on the bulbs, and they seem fine (came up near 0 on my multitester) 4. Fuses both are fine and power makes it to them. 5. I checked the voltage at the bulb. There are three prongs: When...