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[NoodleFace]

An inline resistor is added load, pure and simple. A resistor in parallel is another story.

[NoodleFace]

Like he said. It does sound like you haven't tried swapping bulbs around to see if the problem follows the bulbs instead. At least that would confirm...

[NoodleFace]

Well if your power supply is 12v 10amp it should power your OEM ballast no problems. That's the theory at least. I have a power supply that can achieve...