JD 7400 forager problem

[Hummin-Cummins]

Our 7400 has developed a weird electrical fault 1st its started saying low engine oil pressure but that’s definitely a sensor as have put a gauge on to make sure, but it will also put the cutterhead into gear on its own which is not good, if you put the switch in and out that will turn it off until it randomly decides to do it again.

Have cleaned terminals and earth straps but still seems to be doing it

Any help is greatly appreciated

TIA

H-C