Hello Oppo, I got a little over eager working on the diesel 323 and pulled the alternator after only a simple test. I checked at the battery and found 12.68 volts with the car off and 12.5 volts with it running. So I pulled the alternator for rebuild. I didn’t do much load testing.

Having a hard time finding the parts for it so I decided to just grab some brushes and clean everything up. Nothing looked burnt just a badly worn brush and lots of oil inside of it from a leaky valve cover gasket (normal for 90's mazda 4 cylinders).

Any good tips on how to bench test the voltage regulator and rectifier before I re-assemble it? Or should I just clean it up and slap it back together and load test it in vehicle if it still doesn’t work?

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Complexity being that it has an engine oil fed vacuum pump run off the back of it.

Thanks in advance for the advice!