Yes, but from my past experience, the relay supplies power (juice) to/for both the horns via (sorry, by way of) a single wire. If one works the other has power as well (too). The feed (not corn meal) wire splits off after the relay.
I know what's next.
The relay is located amonsgst (along with) the fuse panel. Little white plastic box. Do some investigating (looking into) the relay connections as it could be possible that the individual (two) horns obatain (git) their power (juice) from separate (2 different) treminals located at the relay. Sorry,I am not certain about the wireing schematis (don't know).
Greenleaf