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The problem is most likely the contact ribbon under the steering wheel, it has a broken printed circuit ribbon to the horn button, it is referred to as the "Clock Spring Contact Drum"
The biggest suspect I can think of is the ignition switch, as it also controls the electrical as well as the engine. If it happens again then turn your lights on (manually) and check if the headlights are on. If they are then there's a good chance it's ignition related. Check all fuses and make sure the fuse box itself is well grounded if the headlights do not come on. Make sure all battery connections are clean and tight. See if there is a engine code to give a greater clue.
A horn relay will be located under the hood in the fuse/relay block. Check in your owners manual under fuse/relay to see a diagram. If you have no manual go to BBB Industries online under technical bulletins and wiring diagrams to look up your exact year
First of all, short circuits CANNOT be repaired by replacing a fuse! Short circuits are what CAUSE fuses to blow.
The maps for the fuses can be found in the Owner's Manual starting on on page 271.
If you do not have an Owner's Manual for your vehicle, you can download a free PDF version at the link at the bottom of this post.
LOOK ON THE RIGHT FRONT CORNER OF THE ENGINE COMPARTMENT FOR CAR HORN.TO CHECK CAR HORN HOT WIRE CAR HORN USING JUMPER WIRES TO BATTERY.IF HORN WORK LOOK FOR BLOWED FUSE.IF HORN DONT WORK WHEN HOTWIRED REPLACE HORN.
In your owners manual go to the index and look for fuses then go to that page. Look for the horn fuse which should be in the fuse box under your hood around your engine, in your owners manual is should tell you where it's located. Find the fuse for it by looking at the diagram on your owners manual and then pull that fuse out. You should have replacement fuses in the fuse box that's in your car, you have to open the car door to get to it. If you don't have that fuse just take it up to auto zone and tell them you need a replacement for that fuse.
I replaced the horn relay which is located inside of fuse panel under the hood of car on the firewall, have someone push button to be able to hear a clicking sound coming out of the correct relay, then trade out relay of the same and see if horn works
Your horn works off of the engine compartment fuse box. There will be Maxi fuses and regular fuses in it. The regular fuses there is one 15 amp fuse that fuse is for your horn relay. I don't know what direction they go in but it will be the 5th fuse in that row. Right next to that row of fuses there will be a row of Maxi fuses they should go in this order a 50, 50,40,30,50,40,30. In this same direction of fuses the # 2 relay in this order is your relay for your horn. If you remove this relay you should have 12 volts on 2 of these wires. There should only be 4 pins that are used in that relay even though it has for pins. The 2 power wires both work off of the #5 i5 amp fuse in the engine compartment. If you have power on 2 wires at the relay when it is removed then you will need to chack all the other wires where the relay is for a ground when someone holds the horn button down for you to check. If you have a ground when the horn button is depressed then the other terminal that is left in the relay that you removed I need you to take one of the power wires that has 12 volts and jump it over to that other terminal that is n't the ground wire for your horn when the pad is depressed. If the horn goes off then every thing is ok with that circuit then the relay has probably failed switch it with a simular looking relay in the engine compartment fuse panel then see if your horn works properly. If you don't have a ground at one of the terminals when someone holds the horn pad down. Then the problem is probably between the horn pad and the relay more then likely it is your clock spring in your steering column. Let me know if you need any more information then this.
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