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Ok, I put the battery on the charger right after I got home from driving it to work. Been a few hours now. Measurement results.
Remove charger. Measure at battery terminals.
Battery: before starting 12.4V
after starting 12.2V
No difference in measurement with rpm speed.
Alternator: 20.2V
I did measure a few points around engine and ground wire attach points with no significant voltage showing.
Looks like grounds are good? I will check again tomorrow just to be sure.
Looks like voltage regulator is toast?
I have a new alternator waiting at a local parts store but I can't pick it up till Saturday morning.
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