I would first try getting the battery tested.
This could be a problem with your alternator belt as well. You should inspect it. See if it is nice and tight.
Check your battery cable connections. They should be clean and tight.
I don't know how the alternator was checked but it should be "load tested". This is a specific test that is more reliable than simply checking to see what the voltage is when it is charging.
Wednesday, September 21st, 2011 AT 9:57 PM