I fitted the above horn to my GSA 850 as per the wiring instructions that came with it using a new Canbus lead.
The old horn is still fitted but disconnected.
The problem I have is that when I use the horn it will only beep once for a very short time (it won't do a prolonged beep, if that makes sense).
I have seen posts that say it should be wired to the old horn but have no idea how to do this and can't find any information.
All ideas gratefully appreciated.