I need the Opel Astra Bertone 2.2 147c manual

Hello, I need if someone can tell me or pass the workshop and user manual of the Opel Astra Bertone Edition 2.2 Gasoline 147 hp.
The problem you have is that the horn has suddenly stopped working is apparently a fuse or a relieving one but having no manual I have no way of knowing what the fuse or the relay that corresponds.
I have checked the fuse box inside the car and those of the engine and everyone is fine so I do not know if you will have any fuse out there I have seen that some opel have some fuse out of the box in other places.

Thank you so much