It's an electronic chirp not the horn. I will bugger about to see if I can get it swapped around to 2 for lock and 1 for unlock.
I found a link to a Youtube video on the Dutch Seat forum. Unfortunately this is my first post in this forum, so I'm not allowed to post URL's. So here's the URL in plain text (just copy to your browser and it will work). Maybe one of you guys can post it as a real link.
youtu.be/RkDO8Hyanx4
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