Hi Justus,

Thank you for the reply!

I have received the diagram by mail (thanks to Lacing and Andrés) and was able to troubleshoot.

FYI, 1 input of the sideshift was continuous high causing the alarm. Microswitch of lever was in good order. Connected the input witch resistor to ground and connected sideshift with other input to the controller and alarm disappeared!

Thanks and all the best!