That sounds like the same Problem I wrote yesterday.
But my Posting is unanswered. My Posting with Pics, for clarify again:
Hello @Ben and everyone else,
If we connect the X and Y engine as on your plan = Picture: WiringFromBen
then we get the following error message at the first homing = Picture: ErrorMessage
If we connect it so: = Picture: NewWiringPlan
then the X and Y motors can be moved.
Unfortunately, we do not yet know in which direction the print head has to move if, e.g. Y = -20mm drive. Does he have to go back then?