subtle but annoying charging problem - Saab 900 Bulletin Board - Saabnet.com
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subtle but annoying charging problem
Posted by James [Email] (more from James) on Sat, 12 Jun 2010 17:15:18
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This has been an ongoing problem on our 1993 2.1L... battery slowly runs down over the course of about 2 weeks of driving with progressively worse starts. I recharge the battery + repeat the process.
I think it's a charging problem (vs a ghost current draw) because I measure 12.69V across the battery with the car running which suggests a charging problem (should be closer to 14V). Currently is 12.37V with the car off (getting low again). Switching batteries between cars, both cars behave they did before the switch (ie both batteries good, second car starts instantly).
I measured the resistance across the notorious alternator ground + it looks corroded but measured fine. Voltage regulator was done fairly recently. Any other suggestions?
James...
posted by 67.158.78...
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