Starter Problem

[BG1988]

Went out to crank it, no problem. It started perfectly fine as if no problem ever existed. I've had the battery checked 3 different times. NAPA said battery was good. Autozone said it was bad, needed replaced. Advance said battery was good, needed full charge, and to check ground wires (which I had already pulled and cleaned) and pull off the starter to get it checked. 71 years old is kinda tough to pull a starter to get it checked, but will do it 1st good day of weather we have.

what is the battery voltage after driving awhile (preferably from a Mutimeter or OBD2 reader )
the number on the DIC is a estimation.


if it's at 12.6v the battery is bad or the wires have a bad connection and is not charging correctly...

a float voltage is between 13.0 & 12.8v when off and charged. after a few min