alternator or voltage regulator on 2005 Saturn Relay

my battery went dead ,changed it.now my info center says charging system failure but it comes on and off. also battery volts goes up and down 11.2 -15.0.what could be the problem?

by in Charlotte, NC on December 19, 2009
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
2 answers 1 comment
ANSWER by , December 20, 2009
You need to inspect the data stream of your charging system. The Voltage regulator is now part of the Engine Computer, so first check your Alternator. It could be a bad rectifier, brushes, connections etc.
COMMENT by , May 19, 2015
Unchanging this same issue I've changed my battery with a new one and replaced the alternator what could be the problem
ANSWER by , September 10, 2015
I had the same problem, charger system failure. Check the fusible link wire between the starter and the alternator.