Mine gets all it siganls from the car from the LHS headlight plug, just done a very quick drawing to show the wiring I put in place for mine. I only missed one wire out and thats the one that controls the Hi/Lo magnet in the bulb itself.
Just make sure all the contacts from the car are tight and make sure none of the pins in the HID wiring are bent when you are pushing them together. Also if the cabling has earth cables make sure these are secured tightly to a good earth point.
Also remember the bulbs take about 30secs to get to full tempreture, as mine flickr for about this amount of time when I switch on for the first time.
.G.