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Q: alternator or voltage regulator on 2005 Saturn Relay

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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?
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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.
Unchanging this same issue I've changed my battery with a new one and replaced the alternator what could be the problem
I had the same problem, charger system failure. Check the fusible link wire between the starter and the alternator.
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