Volt meter = 12 volts for a minute then ~9.5
EDIT: SOLVED! I TAPPED THE BACK OF THE ALTERNATOR WITH A HEAVY PIPE. SEEMS LIKE THE BRUSHES GET STUCK/ WORN OUT.
The nut fell off my battery strap, it shook around and the caps came off, voltage dropped to 9..."check gauges" light comes on
Got a new battery and terminals, same problem.
I turn it off, start it up, 12 V, run it for 30-60 seconds and then the voltage drops down to ~9,9.5. This is consistent, every time for 2 days now.
Anyone seen this?
I'd rather change an alternator than PCM. Doubt it's a loose wire. I'll check the alternator tomorrow.