I've got two horns hooked up, as well. I've had no problems with it so far. And it's the fuse box under the hood, that you should be checking.

BTW, I'd just get rid of the stock horn. You can just splice in the AM horns to the factory horn wires.

 

I explained this to you in my post above.
Sorry, but I have no more info that might be of help to you. The rest, you have to chase down yourself using what's already been posted.

 

I checked fuse 47, which i found was the brake fuse. That fuse wasn't blown. I hear the relay kick on everytime i hit the horn. Is the black box relay the fuse also. Is their a fuse just primarily for the horn like the brake one?

 

A relay is not a fuse. The relay is a little black cube thing. It's a double circuit - one is a low voltage side and one is the high voltage side. Low is what the horn button activates. High is what completes the circuit for the electricity to flow to the appliance, the horns in this case.
Relays can go bad. Even though it clicks, doesn't mean it's working. The horn relay is specific to the horn alone. The fuse is shared by several components.

You say you switched it out with another but you used the term "fuse". This tells me you didn't touch the relay in this "swap" since I don't think there is another relay that you could try.

You are using the terms "relay" and "fuse" interchangeably. I have no idea exactly what it is you are focussing on. These are two different and separate things that just happen to be located in the same fuse box and they just happen to be close to each other.

 

It's not clear if you wired in the replacement horns in place of (substituted) for the stock horns, or if you created a separate circuit using part of the stock circuit (horn switch, relay or fuse) to activate your new horns somehow connected to the old relay near the fuse box. In any case, if your intention is to put the stock horn(s) back into service, you need to remove all of the new stuff and restore the old connections. A voltmeter would allow you to trace your circuit backwards from the horn connections to find the supply voltage.

By the way, in the transistion to the '02 and later years when two horns were stock, Honda changed the fuse to 15 amps from the 10 amps of the '00 and '01. You would need to keep this in mind if you need to replace the fuse.

 

The relay is what I connected the AM horns. There are two other relays under this one which look exactly the same but I belive its for the lighting. Cant I switch it out with one of those to see if the relay is bad? When I took it out to see it, they looked the same. My setup with the AM horns were one wire grounded to the compressor. The other wire which lead to the compressor went to a relay which came with the am horns. From there, one went to the battery and the other went to the stock horn relay in that black box. I know the difference between the fuse and the relay but I wanted to know if there is a particular fuse just for the horn(10a 15a 20a). If I connected my old setup back the way it was, the AM horns work.

 

The reason i asked if the relay could have also been a fuse is because I cant find a specific "horn" fuse anywhere in the manual

 

I bet I have the solution: You forgot that you disconnected the stock horns from the factory circuit when you installed the AM horns because they were all (both sets) blaring when you would hit the horn switch. You haven't said if you have established that the stock horns were still electrically connected to the stock circuit.

 

By the way, the fuse appears in the circuit before the relay, ie, supplies power to the relay also, so if your AM horns work by your arrangement, the fuse must be intact. Also the relay must be working as well.

 

I never disconnected the stock horns. Like I mentioned before. It both used to work at the same time:the am and the stock horns when I only had 1 am horn. When I added the second one, the stock horn stopped working. I didnt care much at the time. The stock horns I never touched. All I did in the install was remove the relay to install the wires for my AM horns.