Hi, I recently replace my battery with a 35 series higher capacity (51R original) after the car wouldn't star multply times. Afterward i toke it to auto store to have the alternator checked, headlights and blower were turned on but the voltage read 12.4- 12.6 during the test indicating alternator not charging. I bought and installed a rebuilt one. Still showed 12.4v, didn't know at the time the voltage needed to be below 12.3v to start charge. Called the 800 number they said take it to an alternator shop. They saw it not charge on the car but on the bench it was fine. The original alternator was also the same. Had the orginal alternator rebuilt and installed It didn't charge on the car, we removed the alternators sense wire that goes to PCM and the alternator charged at 14.2 to 14..5v left it that way for a couple of days but again the battery died and the alternator showed not charging. Currently the shop is putting a different mfr voltage regulator in. While testing We've parallel the wire from battery to alt. And battery gnd to alternator gnd, this didn't help. Thank you any answer you have.