I guarantee its the ballast. I've gone through two kits. First were Xentec kits. they flickered. I changed bulbs, got a canceler, a battery harness, and it still flickered. When I did my retro, I got the morimoto ballasts and they work perfectly. My fogs still use the Xentex ballasts and not only do they flicker still, but the color is different than the headlights, and they are all 4.3k. I switched one of the morimoto ballasts Into my fogs, and the flickering stopped AND the color changed to the true color. Get new ballasts, youll be good to go.
RIP - JLM
^^^^SCAN^^^^^^^^^^^CLICK PIC^^^^^^MY BUILD^^^^^^CLICK PIC^^^^^^^^^^^SCAN^^^^