recently (about 2 month ago) i installed switchbacks, yellow hid's in fog(04 model) and it was working perfect but after a while one of my switchback wouldnt want to light up...i repleced them and they turn on whenever they want. but one major problem started, one of my hid's(the projector one, d2s) wasn't lighting up i tryed to turn it off/on but both go out i dont think its the ballast, thinking it was the yellow hid's that i installed i took them off and installed the regular 9006 bulbs back but the problem still there ?? any one can help me out ????