Should car still run on alternator with ground terminal off battery?

One of the first things I said was I took it to AZ and it tested good according to them. However i feel nothing from the mag field test, and AZ Isnt exactly known for their genius "tech". I believe it was them that sold me a dead battery years ago (that I had asked them to check for charge in store before I got it home). Got it home, car still didn't start, ended up then changing a starter motor.... for nothing.

Then most likely it is good the charging problem is elsewhere IE battery, wiring or voltage regulator. I also agree the rear shaft bearing should attract a screwdriver when it is running. You should of had them test the starter before you replaced it.

Brian