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Sounds like the regulator and or alternator is going .
It should read steady with a small load on it like lights on .
Everything else turned off , and don't forget the hvac controls ...
The drain check is with everything off to take an amp reading of what you lose from the battery with the car turned off . (Ie: parked over night)
Last edited by Ian c; 09-07-2013 at 01:45 PM.
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