[MxShawn]

Hey i need some help, my trucks in my sig, i start it up.. ammeter reads fine, voltmeter on the batt reads 13-14 volts.. its charging... as soon as i hit 60 MPH the ammeter drops off and the check gauges light comes on, test the batt.. 12 volts, not charging .. i cant shut it off and start it back up and it will charge again.. till i hit 60... i read up last night and people whos alternater went out, from what i read, the ammeter was very sporatic.. i changed the alternater and it does the same thing.. im lost.. the serpintine belt is fine.. everything else is fine.. please help.. thanks in advance