Headlight problem

DC50

New member
Purchased a 2005 Z4. Last owner had new headlights installed. (Spyder I believe). Halos work, low beams work, hi beam works when you pull lever to flash, but don’t work when lever is pushed forward, although the hi beam indicator comes on whe lever is pushed forward. Any ideas as to what’s up? This is my first BMW so I don’t know much about them.
 

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i need help with this also last owner had crash and replaced with after market ones Missouri will not pass safety inspection
 
Standard BMW Xenon's the "High beam" (halogen bulb) is only used for flash to pass, and the "low beam" (HID bulb) does both the high beam and low beam. Not sure how the aftermarket lights are wired or what bulbs are installed.
 
Only an auto electrician is going to be able to fix that for you. As they are not standard its anyone's guess as to how they have been wired up.
 
My car had weird headlight issues as well. Mine ended up being a headlight module coding issue. check this thread https://z4-forum.com/threads/headlights.152526/ In the post by triggerfish it shows how the outputs change on the headlight module based on the coding of xenon vs halogen. My car was coded xenon even though it was halogen. It took some trial and error but I finally sorted it. Interestingly enough chatGPT was fairly decent at decoding the trace file and giving recommendations. Don't trust it 100% but it pointed me in the right direction.
 
Standard BMW Xenon's the "High beam" (halogen bulb) is only used for flash to pass, and the "low beam" (HID bulb) does both the high beam and low beam. Not sure how the aftermarket lights are wired or what bulbs are installed.
Did the “low beams” have 2 separate elements that accomplished this?
 
Does anyone know which wire in the plug controlled the shutter? Could this wire be used to control the other lamp in the Spyder unit? I presume the Spyder units do not have a shutter, although it looks like there is a piece of metal inside the light housing blocking part of the light.
Thanks for any help on this.
 
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