Sure. The Elec-Trak is really as dumb as a box-o-bolts when it comes to what does what. One can pretty much start at one battery post and play "Mr. Electron" and walk through the entire tractor's electronics with contactors and switches being "drawbridges".Can you identify all of the electrical components on your tractor and briefly describe what they do?
Only complicated part on an E20 is the current limiter for field weakening, and that's not that evil. The E15 is a bit more complicated, but with the general maintenance manual one can get through.
Yup. Discrete electronics are pretty easy to read. Now, what might be nice is to write up a ladder-logic diagram for the E-series tractors.Do you know how to read how to read a schematic?
Speaking of boards, now that Bill is gone I wonder how difficult it would be to make a run of E20 control boards. They're really pretty simple, and companies can make the edge connectors too.
Chris