Everything The HID harness was made to basically be plug-n-play. There was a pin on the harness that wouldn't align with the OEM headlight plug, so I had to cut them both off and just wire them together. There wasn't any small bolts near the ballasts to ground them so I had to cut them off and put bigger eyelets on them, the harness wasn't long enough to reach the passenger side, so I had to lengthen it about 2', and the wire to power the whole kit didn't have an in-line fuse (like it should have) so I had to splice one into it.

Basically, I had to make a whole new harness for the kit to work. And the customer service left something to be desired. I emailed them about sending me a replacement harness (due to the pins not lining up) and them told me I must have ordered the wrong kit and they wouldn't accept it as a return, but they'd be more than happy to send me another one (after I payed for a whole other harness). Needless to say, if I want HID's on my next vehicle, they'll come factory...