Review: Car runs until battery goes dead, when jumped starts and runs again... for a while. Battery tests bad and is replaced, alternator tests good. Problem remains.
Just got the alternator back in the car and got some volt readings. Before starting battery reads 12.62v, after starting battery reads 12.3v. Same voltage at the alternator as at the battery regardless of whether or not the car is running. The field wire (small wire on the alternator... don't know if that;s the proper term) read about 1v less than the battery. System voltage slowly declines as the car runs, so it obviously isn't charging. Now, I would still think that I'm looking at an alternator replacment, even though it bench tested as good, as I have had that happen before, but was wondering if there is something else in the system to check first. It's the Bosch alternator w/ internal regulator that showed good in the testing. Thanks to all.
Matt