Thread: D4 headlight questions

Originally Posted by Tombie

Nope.

Close though. I carefully folded my heat sinks so they fan out between the reflector housing and back body

Yeah I felt like I was squashing them more than spreading them, so went the gentle scrunch rather than the fold! :-P

Originally Posted by BradC

Please don't replace Low beams with anything other than a direct like for like replacement. High beams you can do whatever you like.

The halogens don't have a separate high and low beam globe - instead there's a shutter that opens for high beams. So options are limited.

Originally Posted by Stuart02

Yeah I don't know those ones... I thought the high infill and high/low beam were both H7... are you happy with them?

They are absolutely better than the original halogen globes that were dull and yellow. but a bit fiddly to rotate to the correct orientation and as far as I can tell no option to adjust the angle. It's also a pain because you have to fit them and the whole headlight, test, pull everything out again, and repeat until you're happy.

Originally Posted by Macadamia

The halogens don't have a separate high and low beam globe - instead there's a shutter that opens for high beams. So options are limited.

That is not correct - it is the basic Bi-Xenons that use the shutter.

With halogens, low beam is a fixed globe in the outer light and high beam is a fixed globe in the inner light. On the Bi Xenons this fixed halogen globe in the inner light comes on with the BiXenons when high beam is selected and is termed an "in fill" light.

Originally Posted by 101RRS

That is not correct - it is the basic Bi-Xenons that use the shutter.

With halogens, low beam is a fixed globe in the outer light and high beam is a fixed globe in the inner light. On the Bi Xenons this fixed halogen globe in the inner light comes on with the BiXenons when high beam is selected and is termed an "in fill" light.

considering I just replaced mine I can say with absolute certainty that it is in fact correct

L4.jpg
A: is high and low beams. I can hear, and when I was changing the globes *see* the shutter open and close with the change from high and low beam
B: is the parker light and poverty driving light when in 'auto'. it is a dual filament (dual brightness) globe per below that only comes on when parkers are on or when driving lights are turned on. It actually dims when changing from parkers to low beams
L6.jpgL7.jpg


L8.jpg L5.jpg

I have actually since replaced the parkers/driving lights globes with a dual brightness LED but it's a little too bright IHMO

Originally Posted by Macadamia

L4.jpg
A: is high and low beams. I can hear, and when I was changing the globes *see* the shutter open and close with the change from high and low beam

L5.jpg

Those (A) lamps look like Xenon (HID) to me rather than Halogen. Are you sure they're Halogen behind the shutter.

Originally Posted by BradC

Those (A) lamps look like Xenon (HID) to me rather than Halogen. Are you sure they're Halogen behind the shutter.

No ballast on the underside of the headlight so yes. definitely halogen.

L10.jpg

edit: in the picture i've upgraded to the stedi LEDs. They're a lot whiter than the original halogens.
2022-02-07.jpg

I've still got the original globes in a drawer if you want to see them

Originally Posted by Macadamia

I've still got the original globes in a drawer if you want to see them

All good. I found some references to the peculiar specific Philips lamps in those headlamps. They're an odd configuration that was generally used with a shutter for a Xenon lamp, but in that specific unit they fitted a Halogen.

I'd never seen it done before, and I couldn't figure it out from any of the stuff I could find on-line or the wiring diagram, thus my perplexed question.