View Single Post
      02-11-2012, 01:10 PM   #7
Alpineweiss e90
Second Lieutenant
13
Rep
221
Posts

Drives: AW 330xi
Join Date: Feb 2012
Location: .

iTrader: (0)

You can't just plug in an HID kit nowadays and expect it to work. Vendors don't really know what they are talking about. They don't physically design or engineer their products, so how do you expect them to know how they work? If they are compatible with a car?

The PWM signal on the halogen fixtures lowers voltage and causes rapid fluctuations. This will kill an HID ballast over time. I've seen the voltage in these cars drop to 7.7v volts in some cases.....that's why some people have kits that don't even turn on.

There are 3 things you can do to make an HID kit work on this car:

1) Code the car's PWM duty cycle to 100%.
2) Wire a bosch relay to pull power directly from the battery and triggered from the OEM wiring.
3) Build your own PWM filter.

I hear your grief. It sucks. Unfortunately, this is what can happen with aftermarket products if you don't know what you're doing....especially if both parties aren't aware. Not saying all vendors are like this, but most just want to make a sale....
Appreciate 0