I have replaced both HID ballasts on my 2005 and the passenger side light has gone out again. I swapped in the driver side bulb and another known working bulb and still got nothing. I already have a new igniter to try, but when I have the light off before I couldn't see how to get the old one out. I looked like I needed to take the black plastic housing off the back of the light. Can someone shed light on how to do this.