Thank you garland_m,

It only had a rear wiper motor, I get codes for the front and rear wiper motor, but it says it stops the engine because of a "WASHER". Sadly I do not have a troubleshooting manual and i can not locate the "Washer" on the forklift.

Is there any other way i can fool the forklift somehow?

I am not a pro with Yale trucks, what is a CDF and how can I get it updated?

Thank you and best regards,
Krisztian