That is quite common with JD electric steering. I have a 2012 JD855D and it has been in the shop so many times since I bought it new for electric steering issues. They wanted to replace the whole steering and charge me almost $3k, because they can't figure out why it randomly goes out, the light comes on and you have no power steering. They couldn't fix it while it was under warranty, but they think me throwing more green at it after it ran out of warranty would fix it.......turn they key off and then back on. It will work for a bit, until it does it again.