I understand that you use iso 11786 connector to engage the autosteer according the position of linkage pin 5 (and 7 for ground)
it is hope to you but in this case you are in swich mode
and switch mode and overcurrent function is not the best
after arduino code is open and you can modify as you want …
To my experiance i have opposite view
- Tractor control can be use as manual mode
- AOG control can operate tractor control to be automated
and
- tractor control can activate very low level like color maping … ( with ISO 11786 connector as you say )
- function like Autosteer need to be clearly decided by operator to activate
To be desactivated extra thing like overcurrent or over pressure can do it …