Desperately seeking help. Replaced alternator and battery a week ago. Battery is recieving no charging from the alternator. Have had to charge the battery every 4th-5th time it gets driven. Cleaned the ground from the battery to engine. Checked all relevant fuses (I think). Checked b+ cable to battery (while off the alternator while connected to battery) . Checked connector (again while connected to battery +, center contact lights, outer two do not). Have tested alternator at auto zone twice, both times passed. Removed new alternator, bench tested and failed. Replaced with second new one and still not charging the new battery. Vehicle definitely seems to be running solely off the battery. Can't figure why an in vehicle test passes, but I get no charging voltage on the meter. Trying to help out a friend, but have run out of things to try in order to get her a reliable vehicle. Help!