Hello my name is Omar I have an 05 mustang gt in a manual transmission my battery keeps dying and I got it tested and it came out good then I tested the alternator at O’Reilly’s and it came out bad then I replaced it and my battery is still dying. And every time I put the key in the ignition on position my battery volt drops then I take it off and it goes back up also the check engine light is on along with the battery light and every time my car is about to die it beeps and shows a wrench...

Battery keeps dying