The relay that comes with it is to energize the switched circuits when the bike is on. They recommend hooking to tail light in some cases.
In other words no it would not replace the other relays like on the horn.
Can you tell me if i would leave my current relays in place for my driving lights and the stebel airhorn or would the relay that comes with this replace the current set of relays?
I would strongly recommend using your current relays, you don't want that much power going thru the switches. All your doing is "cleaning up" where the relays are getting their juice from.