If you check your wiring diagram, you have the Y axis leads transposing. That's consistent with what's presented later in the manual where the green block is shown on page 56.
Yes, they are correct as shown both on my diagram and on the original one presented earlier in this thread.
What has been done for the new single Z motor version (R2) and manual though I have nothing to do with.
But I see nothing wrong with what is on page 68 of the new manual. It is consistent with the diagram earlier in the manual and the ones on this thread as well.
The Z motors (R1, dual motor setup) do not transpose because they run in the same direction as one another, so their colors are carried through to the motors.
However if you look carefully at the Y motors, the left-to-right wire order of one of the Y motors is intentionally opposite to the order of the other, but that this transition is performed at the splice, not at the motor connectors.
Perhaps they need to make it more explicit that the transposed wires are for the Y motors only, but with a single Z motor there is no splice in the wires to it.
This makes the two motors turn in the opposite directions, which is what they must do mechanically.
But, even so the gray and yellow are still transposed after the spliced connections.
If you don't do that, they will not run.
So the correct wiring for the two Y motors is as follows-
Board ---- Motor1 ---- Motor2
Green ---- Green ---- Red
Yellow ---- Yellow ---- Gray
Gray ------ Gray ------ Yellow
Red ------- Red ------- Green
If you trace the wires through you will find that this reversed order happens at the splice junction, not at the motor connectors.
Keep in mind that I removed the molex connectors are one point, and replaced them in a straight line (no transposing of gray/yellow)
As for why yours are not running, if you did not transpose yellow and gray, they will not run.
This is because you are electrically cross-connecting the two motor phases.
Positive Z lowers the bed because the height of the nozzle will then be greater relative to the bed with increasing Z values, so it is effectively a "positive Z motion" despite the bed moving downward (yes, I know, a bit counter-intuitive, but it is what it is).
Also, FT-5 printers home to the right rear rather than the front left as many others do.
That is because the other printers move the bed in Y to the rear and the head in X to the left, effectively positioning the nozzle at the front left corner. Plus they actually move the nozzle upwards.
But the FT-5 bed only moves vertically and the head truly moves left/right and front/rear.
So here X+ goes toward your left and Y+ (when you get it running) will move toward you.
Both motions move away from the home position with increasing values.
I'm sure there is some grand method to reverse them, but in practice it doesn't matter.
Things print correctly.
They are just rotated 180 degrees from the operator's viewpoint.