thanks for reviving my old memory on the resistance values natcho ! my idea of using the dual ballast was to hide the diode in the unused cavity, then use spades [factory tabs through the ballast] and re-wire the dual plug to connect the single ballast to the diode. it wouldn't look totally factory correct, but similarly correct, as you would be using factory terminals and a factory ballast. i guess it would come down to how the final appearance looked, and it's position on the car. hope i'm somewhat clear in projecting my thoughts on this idea.