hello i have a problem with a lance ypsilon 843 1.3 mtj 199A9000 55kw

the fuse f18 in the engine compartment occasionally blows, this fuse controls the power supply to the engine control unit and the air conditioning

the fuse breaks even with the air conditioning off, even just moving the car or sometimes while walking, I wanted to know if anything like this had happened to anyone else, I checked the wiring as far as I could and everything seems fine.

if it was possible to have the diagram for tapping the whole line of this fuse I do not have this diagram in my databases

I await your reply cordial greetings