[jjreed8179]

Ok, I bought some new phillips headlights and stuck one in the driver side and it works. The passenger side not so much. The turn signal works on the passenger side though so could it still be the ballast? Does the ballast not control all the lighting? Also on a side note the bulb I took out of the driver side looked brand new while the one that burnt out of the passenger side was the original. A sad day in the world of Toureg.

 

[TREGinginCO]

The ballast only is for the xenon bulb. It's the electric boom boom to properly ignite the xenon gas inside the bulb. Kinda like a ballast for a florescent light bulb.

 

[jjreed8179]

The ballast only is for the xenon bulb. It's the electric boom boom to properly ignite the xenon gas inside the bulb. Kinda like a ballast for a florescent light bulb.

Whats the metal thing on the entire unit? ON the bottom side of it. Is that another ballast? does this light everything or just the bulb as you already said. Sorry I'm just a little confused as to how many ballast there are and what they all do. Trying to avoid a 40$ diagnostic fee.

 

[QPower1]

lamp info

The lamp for the HID (bi-xenon) Touaregs has the ballast/igniter attached as its base. There is also a step-up transformer behind the lighting assembly that brings 12v to the 85v needed for the lamp.

These vehicles are known for shorts in their headlight wiring harnesses. Many people speak of corrosion they've discovered. This requires inspection.

Good luck!

Geoff
An official NA distributor for Philips lighting products