Hello I have a Deutz-Faht Agroton 110 from 1998 and I have an issue with the rear lifting. After I bought the tractor the lift arms were not working from inside cab controllers only from the buttons outside of the cab. After I washed the tractor they were not working at all, I have read on google and somehow found like a kind of manual where I read a list of errors. There is a light on the right side panel inside cab where you control PTO and lift arms , and based on the blinking of that light and the pause between you can count them and so you find the error. I have did the counting and so I have figured out that the error code is 18 or 1-8. In the manual mentioned before says that must be an open circuit or something like that , I took a look on the wire connections and also to the computers but can't find any bad connection or something like that , could you please provide me some hints that I may not know ? Thank you.