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#1
04-07-2004, 08:21 AM
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W124 Headlights dim when ABS engages?
During the recent winter i had the pleasure of playing with my ABS system on the snow-covered roads.
I noticed something a bit strange.. My headlights dim very noticeable when the ABS kicks in. Is that normal? When i turn the starter with the headlights on, they almost doesn't dim at all. Does the ABS system really require more electrical power than the starter motor? Freestyler
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Never criticize someone until you've walked a mile in his shoes. That way, when you do, you're a mile away -and you have his shoes! '86 300E optically converted to '95 E300 (Sold) -Blauschwarz on silver -Black leather -17" AMG & 15" AMG for winter 
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#2
04-07-2004, 10:13 AM
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One of the sysmptoms of a failing alternator (regulator) is the ABS indicator on the dash lights up. So I suspect it requires a considerable amount of current to operate.
That said, I would test your charging system...it may not be up to the task.
__________________
2009 ML350 (106K) - Family vehicle 2001 CLK430 Cabriolet (80K) - Wife's car 2005 BMW 645CI (138K) - My daily driver 2016 Mustang (32K) - Daughter's car
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#3
04-07-2004, 11:41 AM
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Sounds normal to me. If you use the ABS often enough, it will be turned off as the battery falls below a preset voltage.
While driving, push up on three of your window switches at the same time, with the windows already all the way up. I bet that will dim your lights a little too. Mike
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'90 300SE 298k -300K and it gets put into retirement. '80 300D 255k Purchased new by family in 1980. Had a: 1973 220 (gas) 1980 300SD 1992 400E
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#4
04-08-2004, 02:40 PM
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Pushing all four window buttons don't make the headlights dim at all.. I just tried.
But when the ABS activates, the headlights dim to about half the normal light output. -And they are dimmed for about a second after the ABS de-activates. Then they flick up to normal strength again.. I find it a bit strange.. Freestyler
__________________
Never criticize someone until you've walked a mile in his shoes. That way, when you do, you're a mile away -and you have his shoes! '86 300E optically converted to '95 E300 (Sold) -Blauschwarz on silver -Black leather -17" AMG & 15" AMG for winter
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