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E12, E28, E34, E39, E60 General discussion and technical help for all year 5 series cars.

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Old 12-03-2008, 05:30 AM   #1
raybeam

Name: raybeam
Title: United Newb
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Location: south wales uk
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Your Ride: 1990 520 2.2 auto
charging light comes on intermittently.

can anyone help with this problem? I could be driving at 30mph and the red light comes on for the charging system.stays on for 10--20 seconds and sometimes on tickover.It`s a little iritating to think perhaps the alternator is defunct or is there a regulator not doing it`s job.
Go for a 100 mile plus drive---no problems----enter suburban areas at speed limits,red light appears again----anyone out there know the possible cause.
It`s driving me nuts!!! Car is a bmw 520 auto---circa 2000---2.2petrol six cylinder.
Cheers----raybeam...
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Old 12-03-2008, 08:22 AM   #2
3050rpm
 
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My bet IS that it's the alternator or voltage regulator, I'm guessing you have about 150,000 miles on this car. Get it checked out before you get stranded on the road.
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