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NastyEllEssWon · 05-19-2008, 02:47 PM

just stick a voltmeter on the batter while the car is running. if the alternator is bad it will be charging less than 13.8-14.3 volts. battery should be at 12-12.6
with the car off. i would check some grounds if its a new alternator and the battery is good. im not sure what kind of car you have but if your car doesnt have a serpentine setup up front you might want to check the belt deflection as well could be loose and slipping around the pulleys causing the alt to charge less.

edit::check all power wires to alt....and battery. also make sure the connections to the terminals on all electrical connectors arent crudded up and nasty causing bad current.

05-19-2008, 02:47 PM	#8
NastyEllEssWon Join Date: Apr 2008 Location: Delran Posts: 6,785 iTrader: (11)	just stick a voltmeter on the batter while the car is running. if the alternator is bad it will be charging less than 13.8-14.3 volts. battery should be at 12-12.6 with the car off. i would check some grounds if its a new alternator and the battery is good. im not sure what kind of car you have but if your car doesnt have a serpentine setup up front you might want to check the belt deflection as well could be loose and slipping around the pulleys causing the alt to charge less. edit::check all power wires to alt....and battery. also make sure the connections to the terminals on all electrical connectors arent crudded up and nasty causing bad current. Last edited by NastyEllEssWon; 05-19-2008 at 02:48 PM.