Valtra T3 clutch button problem

[T C]

Got a hi-tech T153 with a problem on the de clutch buttons.
When the button is pressed the clutch disenges, transmission display shows N but then the clutch does not re engage - got to restart the tractor. There is a button on both the gear and range levers and both have the same problem.
Checked the wiring and it looks OK.

 

[agcoparts]

Clean the wiring connectors, which go under the levers with contact cleaner. If the problem persists, replace the wiring harness.

 

[Sid]

We had similar issue with range down button.
It would change gear and range up but the down button wouldn't work. Only way to go down from C or D was to drop the tractor into creeper and go up again.

Replaced button and wire back to connector. It's a fiddle.