My 02 a has two horn setup. The high pitch horn stopped working and now when I use the horn it sounds odd. When I dismounted it, a lot of water came out of it. Strange that they would mount it so the horn opening is facing up. After I drained all I could out if it I could still hear water sloshing around in it when I shook it and it would still not work.
The dealer and Ford OEM replacement parts on-line require you buy a set of horns and want more than I would like to spend. I searched around and found that universal replacement horns require cutting the wire to put on a different style of connector. I searched more and found RockAuto.com has a single high pitch horn that is suppose to be a direct replacement. The connector looks a little different but it looks like it may work fine with the Ford connector. It is still a little more than I would prefer to spend.
I found a Fiamm Freeway Blaster on-line for $10 and that is more like what I am willing to spend. Fiamm is the manufacturer of the original Ford horn but the Freeway Blaster has a different part number. I asked for a picture of the electrical connector and is doesn't look like a direct fit but I think it would work with a little modification to the plastic around the Fiamm horn connector.
Before I committed to buying it I discovered that my original horn had dried out after being inside my house for awhile. I decided to test it and it worked again. Since the Freeway Blaster is cheap and shipping is free I think I will go ahead and order it to see it I can get it to work in case the original horn stops working again. Has anyone tried using the Fiamm Freeway Blaster and was able to use the original Ford connector?
I plan to mount the horn with the opening down to keep the water out. I doubt that will effect the sound.
So, if you are having a problem with your horn and it has water in it. You might try turning it down to get the water out and drying it. It may start working again like mine did.
2002 FX4 Bright Red Supercab 4.0 SOHC, manual 5-spd & Tcase, 33" BFG MTs, K&N air filter, Modified air box inlet, Gibson SS cat. back exhaust, Bama flash, Hidden Hitch round receiver, Rear helper air springs, Electric trailer brake controller, Line-X bed liner, WAAG bar with KC lights and Wildernest shell.