MF7719S ISO11786 speed pulse problem

[No5]

I have a problem with the speed output signal on a 2019 MF7719S. I have fitted an amatron+ control for a mounted sprayer.
The cable takes the signal from pin 2 which is supposed to be the theoretical speed only it isn't.
Both pin 1 and pin 2 on the tractor socket are from the radar.
Is it posible to change this output on the tractor data5 screen or will I need a dealer with a laptop?
The sprayer was previously on a 7624dvt and it worked perfectly.
Could this new tractor be wired up wrong?

 

[wold-topper]

I used an Amados control box with an MF7620
To begin with didnt work but MF knew the issue and easily sorted with a resisitor behind the socket