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Join Date: Sep 2009
Location: Acton, MA
Posts: 68
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Alternator problem
I have a 2004 Boxter S. A week ago the alternator light came on in the car. I checked the voltage at the battery while the car was running at it read 14.2. With the car stopped the battery read 12.5. Everything seemed to be working fine but I pulled the alternator and had it rebuilt. I reinstalled it today and the alternator light still comes on. I'm not sure where to look next and I haven't seen anyone else in the forums with a similar problem. Suggestions on what the problem could be?
Thanks, Dave
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'83 SC '85 Carrera |
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11-09-2019, 05:31 PM
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Join Date: Dec 2015
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Who rebuilt it and what did they replace? If they didn't replace the voltage regulator that would probably be your issue.
Available here on Pelican Part#000-043-206-37-OEM |
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11-11-2019, 07:21 AM
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Location: Acton, MA
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yes, they replaced the voltage regulator. I'm confident the alternator and voltage regulator is working properly.
I believe the blue wire attached to the alternator controls the dummy light. I assume if that is broken than I would the problem I'm describing. Can anyone confirm that?
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'83 SC '85 Carrera |
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11-11-2019, 07:32 AM
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anyone?
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'83 SC '85 Carrera |
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11-17-2019, 09:45 AM
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The idiot light is powered and the voltage regulator provides the ground when the alternator is not working.
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11-19-2019, 08:19 AM
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