A while back I did an HID conversion upgrade on a Mazda 3. Disappointingly the left side is apparently not coming on. As the car is 400 kilometres away I'm unable to check out why that is happening. I'm hoping it's just a bad Ballast, so I sent through the old kid to test with. I hope that is the case because that would be a simple explanation. I like simple explanations. Although it would still be disappointing in a way because the new Philips set would have been faulty out of the box, it probably can't be returned and even if it could the box is here and it is there, that would be a mission.