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Well, Do you have a volt ohm meter? Perhaps the simplest test you can do is, with car off and no charger connected, test the battery voltage. Fresh charged should be ~12 volts. Now start the car and test battery voltage. Have someone rev up to around 3500 rpm. You should see voltage increase to around 13 volts or so. If so alternator is prolly OK.
PS: Make sure lights and all voltage drains are off.
Last edited by 911monty; 06-10-2016 at 07:00 PM.
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1998 Porsche Boxster
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