Sounds like a bad ground to me as well. When I first wired up mine I had the same problem I re-wired them and they work fine now. I did burn out 2 bulbs because of the ballast not getting enough power. Just go to your local auto parts store and pick up a relay and some connectors. Then google "HID relay wiring diagram" and you can find several images to help. Relays are so cheap and easy I use them as much as possible. I loathe electrical issues so to me it's worth it. Good Luck!