Where is the horn relay switch on a Peugeot 307?

The horn relay switch on a Peugeot 307 is typically located in the engine compartment fuse box. To access it, you will need to open the fuse box cover, which is usually situated near the battery. The specific relay for the horn is often labeled in the diagram on the inside of the cover. If you're unsure, consulting the owner's manual can provide additional details on its exact location.