Electric Horns (non Valk)

[Mase]

My SUV horns are sucking lately so I need to replace them.  They are a TWO wire OE set.  I found a set that I want that are a ONE wire OE set.

As long as I find the hot in the SUV's horn plug can I hook these ONE wire horns to the SUV?  It would seem simple but I do not want to blow some relays or have to add a bunch of stuff.

Any tips?

[Gryphon Rider]

One wire horns use the horn body and the chassis where it mounts as the ground.  GM horns I've seen recently use a green wire for power, and if two wires, a black wire for ground.  If you are unsure, use hearing protection, a test light, and your favourite helper to push the horn button.