Just bought a used 2000 Roadtrek 2 months ago and the first trip I took with it, the water pump worked fine. It's a 12V SureFlo. I did try running it with a dry tank as I didn't realize I had run out of water, but it was at the end of my camping and I was leaving then anyway, so turned off the pump and drove home. Last weekend took it out again and when I got to campground, the water pump, when you turn it on, does this buzzing sound and that's it. Haven't tried troubleshooting it yet, just wondering if anyone else has had this problem and what was the fix for it. A new one cost around $69 on the Internet, so it doesn't seem too painful to have to replace it, but maybe it's just an easy fix. Any ideas?