Horn Please Help, running out of ideas what to check Options

[arsalan500]

So i picked up a 1996 celica to flip about 2 years ago, and someone ended up stealing the convertible top while it was in the auction lot.

So it sat around for a while, upuntil about 3 months ago I got a parts car with a good top and swapped it on. The car had alot of issues and im down to one of the final ones, the horn.

In Virginia a horn is mandatory for state inspection, which is the last thing i need before I can sell it.

Here is a video of my sistuation with the horn:

https://www.youtube.com/watch?v=WVBFE6prMQg

If my accent was to heavy to understand, this is the written version:

I have replaced the fuse and the relay and still nothing. I do hear a little click from the relay when pressing on the horn. I looked around trying to find the horn, and I kind of found 2 horn looking things. On the parts car there was a horn on the top passenger side by the radiator, with just one wire, replaced that on my project car, and still nothing.

While looking around, I saw something else that looked like a horn, on the driver lower side mounted on by a 12mm bolt. This one had two wires. Grabbed it from the parts car and plugged it up. I took both the original and tried to just hook them straight to the battery, all I got from that was just a spark from the terminals where I put the wires next too. Isnt this a way to test the horn?


I would appreciate any help guys!!

[Bitter]

The horn is grounded to the body through the bracket and bolt which is why it only has one wire, if that ground is bad it won't honk. You need to get a good clean bare metal contact between the horn and body, then if it still doesn't work you may have another problem but bad ground is the most common.

[arsalan500]

If you were refering to the horn looking thing up top, near the radiator on the passenger side; I just ran out and tried to wrap a wire around the bracket of the horn and tried to plug it up to the battery and got nothing again.

I then tried using some sandpaper where the screw mounts up to shave off the paint and have some metal show. then I plugged it up again and mounted it propperly, and I got nothing again.

Where do I go from here?

[Box]

Yep, proper ground is important. Can also test the horns by connecting them straight to the battery. Possibly could be the relay as well. It should be one of those three things though.

[arsalan500]

So I have replaced the relay, fuse, installed a horn, made sure there is proper ground connection by sanding the part that the horn connects too... Where do I go from here?

[Noahwhite2014]

Make sure he plug isn't shorting first of all. Grab an old 9v battery and touch just connect the wires to the 9v battery (you can use your car battery if you want, but I always use test batteries before possibly shorting small gauge wires to car batteries lol) and watch for a spark. If there's no spark your plug is good.

Try connecting 1 wire at a time to the positive of the battery and the bracket of the horn to see if it'll go off.

If you have extra fuses available, try shorting the power wire from the horn to the chassis. To make sure you're getting power to it.

But really, just buy a multimeter off of Amazon and pay a bit extra for faster shipping if you don't want to wait. They'll be cheaper than anywhere local and have more features as well.

[arsalan500]

When I get home today, I'll take a pic of what I think is the horn and then show you guys hows Ive tested it so far

[Box]

Hmmm, unless for some reason the horn button isn't making contact. That or it's oxidized badly enough to not complete the circuit. If it was sitting around for awhile with a bad top probably lots of moisture has been in the interior.

[arsalan500]

I know for a fact it had alot of moisture in the interior, I had to change the carpet. How do i test if its making contact?

[Noahwhite2014]

I know for a fact it had alot of moisture in the interior, I had to change the carpet. How do i test if its making contact?

My third paragraph of my previous comment. If the horn is good and making solid contact then there will be Sparks when you short the power wire going to the horn, to the chassis. Safer way Is with a multimeter lol

[jesse09]

Have you tried removing the airbag and making sure the actual steering wheel is grounded? This was a culprit of mine for a long time until I got behind it and fixed it. It takes 10 mins btw

[Box]

^Yup, just make sure to disconnect the battery before fiddling around with the airbag.