According to the fuse box top that blue 15A fuse should be a red 10A fuse. If I was a gambling man I'd wager an accessory has been spliced into that circuit and is overloading it.

 

I know but i hat no other fuse

 

The question remains - Has any accessory been spliced into that circuit?

Top tip - While you have the cover off slip a 10A fuse back in there.

 

@Rkos ben je inmiddels achter het probleem gekomen? Ik stond vanmiddag in Duitsland met hetzelfde probleem.
Motor moeten laten staan en op die van mijn vrouw samen teruggereden:-(

 

Check the connections and switches served by the fuse. If no issue there, start looking for shorts in the loom(s)/sub looms.

 

@3 Twins Thank you for the suggestions, I'll take a look at it somewhere this week.

 

Found it, it was the wire from the brakelight. It got stuck by a bolt from the recently mounted Givi Rack and it caused a short. Easely fixable but hard to find