Sorry for the late reply on this. I hurt my back playing tennis over the weekend and the unfortunately the pain has been brutal [emoji24] so haven’t really had a chance to look into this at all.
This is the website I used to check the fuse:
https://fusesdiagram.com/bmw/fuses-a...mw-x5-e70.html
According to the website there’s only one fuse for the horn which is located at F9. That’s the one I replaced and as soon as I tried the horn it blew and all I hear is a clicking sound when I press the horn. I did watch the YouTube video which you posted which was very helpful.
I’m not very electrical savvy at all so while the diagram was informative... I’ll need a lot more help to try to figure out the issue.
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