You want a "bi" Xenon system for HI & LO headlight configurations. These cost twice the amount; but have HID on both Hi & Lo beams. The BI type HID lights utilize all three wires.
I bought a kit (H4 5000k Helios Low beam) for my new 2006 Suzuki Aerio SX. The car uses HB2 bulbs which are compatible with H4s. I installed all the components and it was definitely fool proof except when I tried to test it, nothing happened. I was stunned because everything was completely connected and directions were followed thoroughly. Anyways, I took a look at my car plug to the headlight bulb and it had 3 wires: red, white, red/white. The H4 kit plug only had 2 wires: red, black and theres an empty plug slot. The plugs do align perfectly and match except the car has 3 wires while the HID kit only has 2. I asked the guy who sold it to me and he told me to check my car plug to see which wires were negative and positive. Even with that, I don't know what's wrong. On my car's forum board, there are plenty of people with the same car as mine who have H4 HID kits converted with no problems at all. And on top of that, my signal lights started blinking really fast. It's a problem too because it almost like a strobe light. Please, can anyone shed some light on this? I was really excited about this but now I feel just depressed. Thanks