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#1
11-03-2008, 03:36 PM
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ABS Light always on - Battery goes dead
I have a 1985 380SL which has been giving me problems, many problems. Today it is the ABS light which is always on! Along with the light the battery goes dead within 24 hours. I have had two new Interstate batteries that went dead and then would not recharge (gave a 'Fault' on the charger). I now have the battery disconnected while I look for an answer. I noticed, using a voltmeter, that when I turn off the engine the voltage starts to drop. I can see the reading go down about 0.1 or 0.2 volts every minute or so.
What the heck has happened? Thanks for any clues. Bob Chapman 
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#2
11-03-2008, 03:40 PM
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Check you alternator output. When alternators go south you get all sorts of unusual lights
__________________
BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif 15 VW Passat TDI 00 E420 98 E300 DT 97 E420 Donor Car - NEED PARTS? PM ME! 97 S500 97 E300D 86 Holden Jackaroo Turbo D 86 300SDL (o\|/o)
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#3
11-03-2008, 07:54 PM
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Check the alternator regulator (it's a $20 gamble to see if that will fix it). If not, the diodes in the alternator could be bad/leaky-which can drain the battery, and these are not easy to replace in the field, never mind finding replacements. in that case, you would have to get a new/rebuilt alternator.
__________________
86 560SL With homebrew first gear start! 85 380SL Daily Driver Project http://juliepalooza.8m.com/sl/mercedes.htm
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#4
11-04-2008, 10:23 AM
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FWIW John Roncallo has an alternator for sale
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