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2003 Ford Focus Question: battery light flickers

 

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Visitor, 2.0L 4 Cylinder SOHC, Romeoville, IL, February 05, 2011, 20:47

My battery light flickers on and off at all different times. Never had an issue until I had the alternator replaced a week ago. I replaced the battery less than 2 months ago and when I had it tested it was reading at over 14. What could be causing this? It is the middle of winter and I don't want to get stuck somewhere. Every time I try to take it to a place like Auto Zone to have them check it the light is never on.

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, February 05, 2011, 22:40
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    Check that the battery connections and connections at the alternator are clean and tight. After that I suspect an internal alternator problem. Looking at the diode pattern on an an oscilloscope and looking at the pattern "loading" the alternator may show up the problem.

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