Glad you got it sorted out 
But for future reference: It is not possible to measure resistance on the hall effect sensors (which this RTY are) You must apply 5v and GND then you can measure something between 0,5 and 4,5 v on the signal, when turning the sensor axle. If you turn the axle 180 degree you also get 0,5 to 4,5 V.
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Good morning. Which wires activate the automatic steering? 4 pin + 8 pin activates automatic section control.
Pin 8 is the steer activation, can be wired to a switch or push button. It gets connected to one of the earth/ground pins
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And pin 9 for work switch which can control auto section control.
You need to connect the other wire from the switch to ground, can be any ground on the tractor.
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There are parameters somewhere in AOG to tell what the signal does.
If you don’t want sections activated with steering then desactivate “steer swich”
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Many thanks to everyone who helped me with the “auto steering” tips. Today, the tractor already knows how to drive itself. Of course, there are still many unknowns. I know that knowledgeable people in this forum will give the correct answer. If you are interested, it is possible to upload pictures of the installation of Baraki hydraulic controls on a Fendt 309 vario. Thank you! 
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Feel free to write up a Success Story, we need more of those
I can’t turn the steering wheel while the autosteering is on.
That is what the lock valves do, so normal.
If you are asking how to stop autosteer, when trying to turn steering wheel, then check if your baraki valve blok is fitted with the pressure switch or the newer pressure sensor, and make the setting and wiring to use this possibility