Single Field Alternator Rebuild Help!

So you did disconnect the stater before testing the diodes?

And if I ? understand you? You got one diode that shows the same readings both ways? That would be bad, I would think.

Correct on both accounts. The capacitor has me at least concerned as I read on line that a bad diode can be caused by a battery being hooked up wrong or a bad capacitor. And they are not cheap for what they are.