A fully charged battery has 12.6 volts.
So far your readings are suggesting that the alternator is working.
I find it difficult to believe that you have had 2 batteries fail every 3 months. Maybe something happened with the car and drained the battery so that it was discharged. But the battery wasn't at the end of it's life.
Right now, it seems that everything is working correctly.
Unless you haven't mentioned something about your module.
The next time you have a problem with the battery or the module, or the alternator, come back here and tell us about what's going on.
And we'll help you get to the bottom of it.
Tuesday, July 21st, 2009 AT 12:34 AM