I am in the process of fitting an Autofarm to the 8120 and it appears I might be able to use the steering angle sensor that is mounted in the steering ram and also the steering valve on the combine. My problem is that when I dissconect the steering angle sensor from the combines wiring and connect it to the Autofarm harness an error message comes up on the Pro 600 to say that it is dissconnected. I can't seem to find anywhere in the system to tell it there is no sensor . The error message keeps coming on and there is no option to ignore it. Can anyone help?