[olaugh]

I thought my charging issue would be straight forward but I am still at a loss. Dash shows 10 to 12 volts depending on how much load. The battery has been pulled and tested good. All connections are clean and not corroded, and belt isn't slipping. I replaced the voltage regulator which I thought was the problem as the former one had very worn brushes. Alas that did not solve my issue. 

 

 

With the car running, new regulator and fully charged battery, I am getting 11.8 volt between the battery + and battery - posts. 

 

I get 17.9-18 volts off the alternator + post to the battery - post. It appears that my alternator is over charging (over 15 volts) but yet the battery is being undercharged?

 

I am getting 9.2 volts from the alternator + post to the battery + post. Looks like crazy voltage drop. 

 

Can someone please help diagnose or recommend next diagnostic steps? Thanks!

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[Waylander]

the charge goes from the alternator via the posts on the starter motor,

 

I would think its time to call a auto electrician to come and help, it could be the diode pack in the alternator, loads of volts and no amps at all

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[MCL968]

The wire that runs between the alternator and the post on the starter that charges the battery is a known point of failure. I would check that too.

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[unknown4u]

Does the bulb in the dash light up red?

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