Xenon light malfunction(not ballast)

exoray · 12-09-2022, 10:14 PM

My passenger light has been out for a while and initially it appeared to be the ballast after testing. However, the light went out after swapping the ballast. What could be the issue? Any methods to test? Would having a blown ballast in for too long result in the frm cutting power to the component? But even then, shouldn’t the light not turn on at all instead of turning off after working for a bit?

Serf27 · 12-10-2022, 06:40 PM

Possibly an internal short in the headlight.
The frm can cut power if it senses a short and you’d have to fix it then reset frm counters.

12-09-2022, 10:14 PM	#1
exoray Enlisted Member 8 Rep 36 Posts Drives: 2008 E90 335i Join Date: Apr 2021 Location: Southern California iTrader: (0)	Xenon light malfunction(not ballast) My passenger light has been out for a while and initially it appeared to be the ballast after testing. However, the light went out after swapping the ballast. What could be the issue? Any methods to test? Would having a blown ballast in for too long result in the frm cutting power to the component? But even then, shouldn’t the light not turn on at all instead of turning off after working for a bit? Last edited by exoray; 12-09-2022 at 10:28 PM..
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12-10-2022, 06:40 PM	#2
Serf27 Brigadier General 2851 Rep 4,322 Posts Drives: 335i Join Date: Apr 2018 Location: Sitting in a BMW. iTrader: (-1)	Possibly an internal short in the headlight. The frm can cut power if it senses a short and you’d have to fix it then reset frm counters.
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