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The horn itself is a simple mechanism. It must have good power and ground connections. First check your horn fuse to ensure it's not blown. If the fuse is okay, then test the horn by connecting a wire to the positive terminal and touching it briefly to the connection for power at the horn. If the horn comes on you have a problem between the connector and power. If the horn does not come on it may have a poor ground or the horn may itself be faulty (this rarely happens but it's not unheard of). The horn is simply a metal plate that vibrates due to a coil that's powered when you push the horn switch. I have experienced a few horns that seem to change their sound then quit working by spraying into the horn a 2 or 3 second burst of WD40 or some silicone spray. Do not do this when the horn switch is being pushed as the sprays I mentioned are very flamable. Good luck.
He's correct. I don't want a butchered vehicle, with a horn button on it somewhere.
I hope you don't consider that shop or at least that mechanic a professional.
You only have a horn button,relay and a horn. IF,you are a knowledgeable car repair person,you test,then the results, will tell you which one is bad. Easy job.
In some cases a vehicle may have a clock spring, under the steering wheel that goes bad,(way too technical for your guy)
Must say any shop,even those that are questionable at best,could properly repair that issue,just not your guy,loose him.
The metal plate in reference above has small copper contacts. If they do not meet the horn will not work. We used a dremel on ALL of the contact point and it made no difference, the horn still only works about 5% of the time. After a whole lot of testing (I have the same issue with my 2000 Toyota Sienna) we found that the ground is weak, too weak for the relay most times. At this point I am going to run an alternate ground by "borrowing" the wire for the mute button for audio controls through the clock spring. The existing ground connects to the steering column. Before we discovered this I spent $285 on a new clock spring :(