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DISCUSSION => Electrical => Topic started by: ///M3Mike on January 25, 2007, 08:22:45 PM

Title: ABS and battery lights on after starting
Post by: ///M3Mike on January 25, 2007, 08:22:45 PM

How long are the ABS and battery lights supposed to stay on after starting?  Mine don't go out immediately like the rest.  They eventually go out, but I want to make sure I'm not doing something I shouldn't be.

Oh, and search didn't come up with anything regarding both lights on at the same time.

Title: ABS and battery lights on after starting
Post by: Febi Guibo on January 25, 2007, 09:28:53 PM

Sounds like yer alternator is headed south...

Title: ABS and battery lights on after starting
Post by: Shocker on January 25, 2007, 11:33:24 PM

Quote from: Febi Guibo;18218

Sounds like yer alternator is headed south...

The alternators rarely go out on these cars.  It’s probably the brushes there are two screws on the back of the alternator that hold the brushes in  so I would see what condition they are in before you buy a new alternator(I’ve had several bmw’s that I’ve had to do this to).  But still don’t know if that will fix the problem.  Worth a shot.  http://www.realoem.com/bmw/showparts.do?model=AF93&mospid=47305&btnr=12_0556&hg=12&fg=22   # 10

Title: ABS and battery lights on after starting
Post by: kowalski on January 25, 2007, 11:53:48 PM

i burned out 2 alt's in less then 2 years... and no it wasn't the brushes. I finaly made a 150 amp gm alt. fit and i've been happy ever since.

Title: ABS and battery lights on after starting
Post by: individualist on January 26, 2007, 04:41:23 PM

Quote from: kowalski;18225

i burned out 2 alt's in less then 2 years... and no it wasn't the brushes. I finaly made a 150 amp gm alt. fit and i've been happy ever since.

Tell me more about your alternator swap. I'd like to do something like that.

Title: ABS and battery lights on after starting
Post by: ///M3Mike on February 11, 2007, 02:00:45 PM

Update: Got a new voltage regulator....didn't do the trick.  Guess I'll be running down to AutoZone or somebody for an alternator test.

Title: ABS and battery lights on after starting
Post by: bmwman91 on February 11, 2007, 07:00:28 PM

If it is indeed the alternator, it is the curent handling diodes inside.  It is set up so that when one goes, the battery light will stay lit and you know.  Rarely is the light on due to the VReg going on these Bosch alternators.  I got mine rebuilt for $110.  They replaced the diode plate, VReg AND hot-tanked it.  Call around for alternator repair places.