Quote Originally Posted by Mr. I-MAN View Post
Here is a excerpt from HID forums.

Imagine that we connect the HID ballast directly to where the low beam halogen bulb is connected. Some vehicles might be are able to power up HID systems normally without problems at install time. Most probably, it will not last long. The inrush load can be up to max 13 amps per ballast, compared to 7amps inrush when using halogen. The factory design parameters for headlight curcuit is 7 amps inrush and 4.5 amps continous load. So over time, connectors, multifunction switch, headlight switch, wiring and fuse holders will slowly degrade, beacuse of heat buildup. These components are very time consuming to troubleshoot becuse they are usully well hidden behind dashboards and other wiring looms. Parts easily reaches several hundered dollars. Add 8h labour to that and it becomes obvious that a $50 wiring harness is a cheap insurance.
Quote Originally Posted by uncle_asa View Post
Do not use any other bulbs power than stock unless you add relays!!!

While plus is supplied through relay, the ground wire is going to the dimmer under the steering wheel, so the contacts on the dimmer will quickly blow out, especially when you switch from low to high beam frequently. By installing additional relay instead of the lamp you can improve also the output from the stock bulbs because of the voltage is dropped on the long wire to the steering wheel and back to the ground.
Thinking of getting some 100/90w bulbs on ebay but these warnings are making me think twice. Just curious if people are still running these without any problems?