Mine is the intermitted switch (it goes left) but it only works on one speed. I took out the harness between the switch and the other similar connector (with that black box), and it's still one speed. In other words, I removed the black box
It was grounded (at least I thought it was) but as I removed the switch to try another switch, I broke off the ground. it still works the same way.
btw, there's a little tab in the middle of the switch - in back where it plugs in, and it's in the shape of a triangle. I had to snap that off, to get the plug to fit in.
Now, I just tried to ground the outer casing, and nothing works, but as soon as I un-ground it, it works one speed.
Here I was gonna replace the motor (again) but what am I doing wrong?