Only thing that works on left light is the blinker?

Tiny
BHAMDOC1
  • MEMBER
  • 2015 BMW 528I
  • 4 CYL
  • TURBO
  • 4WD
  • AUTOMATIC
  • 115,000 MILES
Bought this 15 model AWD 528i. Only thing that works on the left light is the blinker. I also see moisture in it. Not sure if the whole light assembly would need to be replaced or some parts that control everything inside could be replaced. It had several codes first, deleted all and these only one that are/maybe related. I tried activating any of the lights on this left side and nothing came on.
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Wednesday, January 29th, 2025 AT 8:10 AM

7 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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The 800FC8 code is the clue, also water in the head light is not good. I would remove the left side headlight lens and check it for damage, then I would get a used lens from eBay which will have the module with it. Then clear the codes and the problem should be fixed. Here is how to remove the headlight lens. Check out the images (below). Please let us know what happens.
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Wednesday, January 29th, 2025 AT 10:41 AM
Tiny
BHAMDOC1
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These lens are not cheap that's why I wanna see about repairing it. It dried out on its own, removed it, removed the TMS and it has water corrosion, I ordered one to see if it will repair it. What wire colors should I look for power?
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Friday, January 31st, 2025 AT 10:31 AM
Tiny
KEN L
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Power for the headlight is red/wht, here is the left headlight wiring daigrams so you can see how the system works. Check out the images (below). Please let us know what happens.
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Saturday, February 1st, 2025 AT 9:38 AM
Tiny
BHAMDOC1
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  • 98 POSTS
Changed TMS and didn't solve it. What else could be wrong? Is this a module? It's on the side of the headlight.
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Sunday, February 2nd, 2025 AT 6:07 AM
Tiny
KEN L
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Yes, you must swap out the headlight module as well.
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Sunday, February 2nd, 2025 AT 8:56 AM
Tiny
BHAMDOC1
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  • 98 POSTS
Someone tested that power wire before because I see evidence of trying to pinch it via a tester light. There is power and ground. I removed that module but there is no evidence of any corrosion. I put it back. Removed the xenon bulb and found out I have one in the garage. Turn the lights on and the low beam came on. I think that module I showed u last controls the halo rings. I ordered one.
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Sunday, February 2nd, 2025 AT 1:05 PM
Tiny
KEN L
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Sounds good, that should fix it.
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Monday, February 3rd, 2025 AT 8:08 AM

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