The horn Button at the steering wheel is simply a switch. It grounds out when pushed causing the circuit to close, routing it though the actual horn under the hood which is sitting there waiting to activate.
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I would suspect an underhood fuse, the steering wheel clock spring, or a wiring problem. It's cheap to triple check all the fuses. The other two will require some troubleshooting to figure out. Since the horn works with the keyless entry, the relay, the horn, and its control wiring seem to be ok.
There is some very wrong information here. Do not remove the cap or mess with the rotor! As someone else said, go to probetalk.com jumper the t/en test point to ground to disable the automatic timing adjustment - after that it's pretty standard procedure.
Check the fuses. Check the relay for the horn.Check the connections to the horns. There will be 2 horns disconnect both. Use a test light ground it to the battery and stick the probe in the wire connector for any of the horns. Have someone press the horn button. If your getting power the test light should light when the horn button is pressed. If it does? You have wither bad grounded horns or bad horns period. If the test light doesn't light? You have a problem in the steering column remove the steering wheel and you will see in there a plastic ring with a copper or brass button that drags on another ring to power the horn button. these pieces ware out and the spring loses its tension. This is a common problem with Ford Trucks. Good luck Please give me good feed back of somekind for me on here. Thanks
That's the horn fuse,you have located it;
I will assume that you have checked for a blown fuse, and that the fuse is good!! If not, check that first!With a test light and a jumper wire, you can locate the problem with little effort! You can get a test light from any auto supply store, or from Wal-mart! They are only a few dollars and are a very helpful thing to have. A jumper wire is just a piece of wire, that you can use to run power from one location to another! If you want to be fancy, you can put alligator clips on both ends! -Start by locating the horns and pulling the wire off of one. Attach your test light to a ground and use the probe (pointed end) to connect to the horn wire. -Have someone hit the horn button on the steering wheel! If the test light lights, then the horn(s) are bad and will need to be replaced! Just to be sure, take your jump wire and run from the positive battery post to the horn power connector (where you pulled off the wire) and make sure that the horn does not sound with direct power! -If there is no power to the horn, you will need to check the horn relay to see if it is getting power. If it is the relay is bad! If there is no power to the relay, the problem is in the steering column or steering wheel horn button! -Most likely the horn or the horn relay is bad! Good luck!!!
check the horn connection. You will need to remove the center cover from the steering wheel. You should see a lone wire with a connector end that mates to a tab. When this makes connection the the center of the steering column (ground in this case) the horn sounds. I would think that if you removed the steering wheel center cover you will readily see and be able to fix the problem.
This is not a hard job, just look the the underside of the steering wheel for the screws that need to be removed to release the cover.
Section 18-01: Wiring and Circuit Protection
1996 Probe Workshop Manual
REMOVAL AND INSTALLATION
The following illustrations show the locations of the various relays on the vehicle.
The Location of the Starter Relay, Main Relay, Circuit (Fuel Pump) Relay, Turn Signal Lamp Relay, Horn Relay, Daytime Running Lamp (DRL) Relay (Canada Only), A/C Relay, Headlamp Relay, and Fog Lamp Relay