I am getting a ssu fault.  (WAS Low)  I have been told that this is the wheel angle sensor but I cannot get this fault to clear.  My dealer has tried every terminator/resistor that trimble has out there and to no avail.  We checked and replaced everything else and still nothing. I really like the autopilot and don't want to give it up, what should or can I do to remedy this problem.  It worked just fine on my 4720 ATR, and the new sprayer ran fine until I put the autopilot on and then the fault started to appear.

Any ideas would be appreciated!