I had to remove this panel (nuts in the wheel well/fender). Take a look at the pictures in my 1st post.
i dont understend, is that 2 sets of wires, the one under the panel and 9 pin connector? Or can i use one or the other?
Some tractors just have the connector (10 pin Metripak) behind the cab and others have a extension from there to the round grey connector (9 pin Deutsch) at the hitch/remote hyd. This extension cable has pin A to A, B to B etc.
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Ok mine has the round grey one. So this is the connector thats called deutsch 9 pin?
I believe so
this is what my tractor shows when i plug in the wires but it doesnt movethe hydraulics automatically. What am i missing?
Check out Matt’s post above. You have to detent the scv finger tip to go into AC mode, and the tractor has to be moving to actually move the hydraulic valves.
Hah of course. 
Revisiting this and just wanted to add this screenshot from a tech manual for anyone reading in the future. It mentions needing between 2.25v and 2.75v immediately after power on and what AC and EC mean.
Also a PDF of the rear harness for an 8000 with the 10 pin metripack hidden behind the cover. The TouchSet harness extends this hidden 10 pin Metripack to a 9 pin Deutsch on the back of the tractor.
TM1576_rear_harness.pdf (553.3 KB)
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Hi just working on a 9320. Has anyone used the 873 sensor power to power the ESP For the grade box?
@ChrisC I believe powered his Nano from the sensor 5v. I doubt it’ll supply enough for an ESP32, especially with wifi enabled.
I powered it from the 5v on a Case 4wd you think this would be less power?
So I powered the esp32 separately from the aux plug. Do I need to use both grounds the sensor ground and the aux plug ground? Can I tie them together?
The reason I ask as I get the EC on the display and detent when moving and there is no action.
You could try powering it directly. On my 8320 it sagged when I tried to power a Nano with ethernet. Just monitor the voltage and see what happens. I’m sure Case and JD do things a little differently though 
You can test whether the grounds are common with a voltage meter. You can measure the voltage from one ground to the other, it should read 0 if they’re common. And you can measure from the sensor 5v to either ground separately and see what you get.
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Still baffled. The EC 1 lights on the display so it is seeing the 2.5v. If I hit auto on OGX the voltages change on the wire going in. But if I drive it doesn’t activate hydraulics. Speed read out works on tractor so it isn’t that.
Anything jump out at anyone?
When I push and lock the switch forward the float icon comes up is this normal on auto?
There is a book with a wrench flashing on the other screen is that an error code or a service?
It should show AC after clicking the detent. There something not correct with either your voltages or the wiring to set the mode.
Do you know what voltage it is looking for to set AC?