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Old 01-19-2013, 01:13 AM   #6
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Join Date: Dec 2008
Location: Queensland, Australia
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Theres a good chance tht you voltage regulator (mounted inside your alternator) is breaking down under load and perhaps your battery charge rate is suffering too.

A simple test (with a multimeter) is to check your battery static voltage - it should be ~12.6v cold - then check the charge voltage @ +/- 1,500 rpm which should be 13.5 - 14.5 v.
This is just a general test because the alternator could be breaking down under load, in which case you need to conduct load tester to your alternator......
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