Thread: battery light
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Old 12-07-2012, 04:21 PM   #12
MachRc
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Join Date: Sep 2002
Location: City of Angels
Posts: 6,596
My Ride: 2003 Technik S1 M3
you can do the non smart way test it like I did(not recommended but I didnt really care) start car, pull the positive cable and see if the car stays on.

On new cars doing this will turn off the car as there are failsafes, but not in the e46.

take it to an alternator shop/ independent
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