Official B5 A4 / S4 Headlight and HID Thread

[RC200]

I'm pretty sure , 1.5V is still there because of the way the wiring is done b/w low and high beam.When you still have 12V on low beam, I'm pretty sure it still leaks into the high beam wiring.
Remember an halogen bulb has a very low resistance, so it washes out this 1.5V ... if really present

Basically the cutoff shield is moved with a solenoid / coil that acts as a magnet, the coil is similar to the ones in a relay, so it should draw about 100-500mA, or maybe less (at least not enough current).
YOu should try with a high wattage resistor in parallel, just to give is a try.
Typical values to try are from 12 to 20 ohms, the resistor draws more current and so should drop this infamous 1.5V when 12V is no more applied for highbeam.
Second test would consist in adding some diodes (1,2 or 3) in serie just to check if it's better (will drop voltage up to about 3x0.6V= 1.8V)

[BlkBullitt]

I'm pretty sure , 1.5V is still there because of the way the wiring is done b/w low and high beam.When you still have 12V on low beam, I'm pretty sure it still leaks into the high beam wiring.
Remember an halogen bulb has a very low resistance, so it washes out this 1.5V ... if really present

Basically the cutoff shield is moved with a solenoid / coil that acts as a magnet, the coil is similar to the ones in a relay, so it should draw about 100-500mA, or maybe less (at least not enough current).
YOu should try with a high wattage resistor in parallel, just to give is a try.
Typical values to try are from 12 to 20 ohms, the resistor draws more current and so should drop this infamous 1.5V when 12V is no more applied for highbeam.
Second test would consist in adding some diodes (1,2 or 3) in serie just to check if it's better (will drop voltage up to about 3x0.6V= 1.8V)

I'll give this a try over the weekend. Haven't really had a chance to test or try anything else yet this week. Will keep everyone updated.

[BlkBullitt]

Thanks RC200! Solenoid issue has been solved. I ended up placing a 1/2 Watt 22 Ohm resistor in parallel and now the solenoids not only work as they should, but they are much more responsive (there was a slight delay before).

I also went ahead and wired up my halogens to the high beams as well... so now I have both Bi-Xenon and Halogen high beams

[somebody5788]

Thanks RC200! Solenoid issue has been solved. I ended up placing a 1/2 Watt 22 Ohm resistor in parallel and now the solenoids not only work as they should, but they are much more responsive (there was a slight delay before).

I also went ahead and wired up my halogens to the high beams as well... so now I have both Bi-Xenon and Halogen high beams

Hey! It was my idea first!! hahaha

On a side note, I just got to thinking. If you wired up the bulb before the solenoid, the bulbs resistance alone might have been enough.

[Dutchsider]

Thanks RC200! Solenoid issue has been solved. I ended up placing a 1/2 Watt 22 Ohm resistor in parallel and now the solenoids not only work as they should, but they are much more responsive (there was a slight delay before).

I also went ahead and wired up my halogens to the high beams as well... so now I have both Bi-Xenon and Halogen high beams

This is what I'm in on this for. I want to see this light output.

So this resistor issue, is this easily corrected by the average soldering tinkerer? I know how to solder just fine, just don't have much knowledge on electrical resistance and its subtleties

[BlkBullitt]

This is what I'm in on this for. I want to see this light output.

So this resistor issue, is this easily corrected by the average soldering tinkerer? I know how to solder just fine, just don't have much knowledge on electrical resistance and its subtleties

Yes, it is... I'm not an electrical engineer... just a soldering tinkerer like you.