I have all three jumpers installed, this board is just acting very strange. I may switch it out
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I have all three jumpers installed, this board is just acting very strange. I may switch it out
So, in desperation I decided to take my RAMPS board apart and start all over.
And then I see that I had three jumpers on every stepper drive EXCEPT the extruder.
Mea Culpa!
Thank you to everyone that helped me!