As I mentioned in my first post, my first HID was DDM. Unless something has changed, DDM never has claimed a CanBus ballast capability. In numerous conversations with their tech support the only CanBus related item they had was an Error Killer which plugs on the end of the ballast. Those tech support guys, although friendly were of no help in this situation and would state flat out they do not have CanBus ballasts. If you dig into this, and I did, the problem is not the ballasts. Why? How can I say that? Because I would switch the ballast from left to right and vice versa and the low beam problem did not change. My current $35 per pair 35W setup works great ALL THE TIME. Again, my 55W DDM has worked without a flaw on high beam for two years.