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Car Forum / BMW Cars / December 2008'01 E46 M3 flashing head lights
Hi All. I have a most unusual problem with my 2001 E46 M3 US spec. The headlights are flashing non-stop. It's the strangest thing. When the car is at rest with the headlights on, they will flash twice per second continually. When the car starts moving the flashing becomes more random. Only the low beams are effected. No other lights in the system, inside or out are effected. Does anyone have an idea as to why this is happening? Could it have anything to do with the self-leveling system? TIA! > Hi All. > [quoted text clipped - 7 lines] > > TIA! If the HID's have a ballast it may be defective and overheating. -dk > > Hi All. > > [quoted text clipped - 8 lines] > > > > TIA! > If the HID's have a ballast it may be defective and overheating. Unlikely they'd both do it? > -dk  Signature*The more people I meet, the more I like my dog. Dave Plowman dave@davenoise.co.uk London SW To e-mail, change noise into sound. Does each light have its own ballast? Two failing at the same time seems unlikely to me. >> If the HID's have a ballast it may be defective and overheating. > > Unlikely they'd both do it? > >> -dk > Does each light have its own ballast? Two failing at the same time seems > unlikely to me. I'd say so too. However, if they are HID lamps and they are switching on and off, the actual bulbs will have their life shortened. I'm not sure what configurations are available on this car in your country - daylight running lights? A warning from the alarm? Could be a software thing that a reset might cure - or could be an old fashioned short, etc. It's not something I've heard of before. > >> If the HID's have a ballast it may be defective and overheating. > > > > Unlikely they'd both do it? Signature*How come you never hear about gruntled employees? * Dave Plowman dave@davenoise.co.uk London SW To e-mail, change noise into sound. It does have daytime running lights. The alarm in my car is not activated as far as I know. I've never been aware of setting an alarm. Would the self-leveling system act like this if it were defective or "thought" that the levels were incorrect? >> Does each light have its own ballast? Two failing at the same time seems >> unlikely to me. [quoted text clipped - 10 lines] >> > >> > Unlikely they'd both do it? > The alarm in my car is not activated as far as I know. I've never been > aware of setting an alarm. Think it varies by country and by spec, but mine is set by locking the car with the remote on the key. And an option *might* be to flash the headlamps when you do this - if they're not HID. > Would the self-leveling system act like this if it were defective or > "thought" that the levels were incorrect? Wouldn't have thought so. Signature*The closest I ever got to a 4.0 in school was my blood alcohol content* Dave Plowman dave@davenoise.co.uk London SW To e-mail, change noise into sound. Update: It seems that the cause of the flashing headlights was a broken ground wire in the passenger side rear light assembly. After fixing the bad ground, normal operation of the head lights was restored. Who knew! :) > Hi All. > [quoted text clipped - 7 lines] > > TIA! |
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