2004 MERCEDES BENZ
136,000 MILES
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ALISTAIR C
  • MEMBER
  • 1 POST
had regulator on alternator changed due to not charing, had all codes cleared which was thrown up due to this now battery light keeps coming on & reading at battery is 13.5v when i know it should be at least 14v ?
Nov 6, 2012 at 10:47 AM
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MEKANIC4755
  • EXPERT
  • 85 POSTS
The charging voltage is correct at 13.5, sounds like the alt. has blown a diode, this will cause the light to come on to let you know some thing is not working properly in the charging circuit. I f this is the case the alt. will have to be replaced or rebuilt. Thanks for using2CarPros
Nov 6, 2012 at 1:20 PM