From Lee in Tennessee:The first thing I do when that happens is check the relays. Since it happened when you went to reverse I would check that one first.
However once when that happened to me I discovered a wire had pulled loose on the motor underneath my feet. Comes from mowing in the brush I guess.
You wrote: My ET just stopped moving. It is New Idea EGT-150. I was mowing, went to
reverse and nothing. PTO and lift work fine but no drive. The reverse relay does not seem to work but I hear solenoids click in the first 2 speeds.