How do I fix my Horn?

Well, what is the problem? A little more information would be helpful.

Have you traced the wires to look for obvious corrosion or a break?

Do you have a multimeter and knowledge of how to use it?

Have you tried to hook it up directly to 12V?

Have you looked at the switch?

Jody, I bet that was a pretty comical scene to watch you climb up in the bow of a 97. You ain't exactly a tiny feller!

Wiring appears to be good as is switch, I think it's the connections on the unit itself. Maybe just put a new one under the deck?

how long has it been since you used it?   check the connections, and clean for sure, then hold the button and tap the horn with a screw driver handle a few times... they can get stuck from just sitting. from Jody's description, having a spare to just put in there might not be a bad Idea

Thanks everybody, I might try and get a new one in there.

I am having issues with my horn as well. It took some investigating to figure out it was inside the driver's side dash. Then I had to contort myself in there to remove the screws from the panel. Anyway, I checked resistance across each horn and one was higher than the other. I thought I had the problem so I bought a new horn, no way to get into the old ones unless I broke them. I got it mostly wired up, with just one final crimp and heat shrink on the positive wire. I decided to test the horn while holding the wires together. I got a weak breathy noise, but no sound.

I then checked voltage on the circuit by touching the connections while pressing the button & got 6.5 volts. I measured the circuit without the horn in the circuit & got 12.5 volts. After this I kept playing around testing different things. The resistance in the ground wire from the ground bus I just installed at the same time to the horn matched the reading when I touched the leads together. The positive wire was the same.

After playing around a bit more, it seemed that the farther I was from the horn on the circuit, the higher the voltage, up to about 8. I jammed my positive probe into the connection I hadn't crimped & got a good sound, not much more voltage though. I got excited, thinking the issue was the incomplete connection & quickly crimped it. Before applying heat to the heat shrink I hit the button & got 3 good blasts. I grabbed the heat gun until it formed around the connection, then hit the button & got a weak breathy noise again. At this point it was getting dark & I was frustrated so I quit for the night.

I should also mention that prior to installing the ground bus the gauges would all jump when I hit the button. After adding the new ground the voltage gauge didn't jump, but temperature & oil pressure did. Next day I went out & cut the ground loop from the gauges & connected them separately to the bus. I hit the button and got a weak noise with no movement of the gauges on the dash. I think I am on the right track. I still can't figure out the voltage thing though. It is acting more like a parallel circuit than a series so I think I must have a short or bad connection. My plan is to work on the positive side the next chance I get. I am also going to test my old horn on a separate 12V source. Maybe it still works.

Just replaced mine, it was a dual horn which would not come out the vent tube. Remove the box. easier to install the new horn. single horn is loud enough 1/2 the price.