Horn keeps blowing on mazda miata I took the horn button off ,everything looks okay but cant get the horn to stop blowing so I took the horn relay out

Videos and text based help in the link. You may need and auto-electrician with a scan tool computer.

https://www.google.com/search?q=2016+Mazda+MX+5+won%27t+start

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remove the steering wheel and repair the dead short at the contact under the wheel horn button
check for a horn relay and replace it

hi there
The horn is blowing while you turn your steering wheel ,correct?
when you took of the horn button it was still blowing?Do you have an alarm from factory on the car?

ivan
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horn relay located on the right side kick panel,you will see a row of relays,if horn relay is okay, more likely your horn control pad has a short inside causing horn button contacts to stick causing horn to keep blowing.

The next step is to check to see if you have continuity along the wiring. You will need a multimeter and a helper:

- Set the multimeter to measure voltage
- Touch the red lead to the horn wire connection, making sure you are making metal to metal contact with the connector. Then touch your black lead to a metal point on the body of the car (NOT a painted surface!), or the other horn wire connector (if there is a 2nd).
- Observe the meter for a rise in voltage as you have your helper push the horn button.

If you get a voltage reading, then try reseating the connections (signal and ground) back on the horn and try it again, making sure connections are clear of corrosion.

If you do not get a signal, recheck your multimeter lead contact points (just to be sure) and then try again. If you still do have a signal then you are losing your signal somewhere along the way from the fuse to the horn.

There is also this link where you may be able to find some useful info: http://forum.miata.net/vb/showthread.php?t=279008

• The horn relay might have welded contacts (stuck in the on position). Pulling the relay should stop the horn.
  
• The wiring harness on the steering column might have a broken wire to the horn relay shorting to someplace that applies power to the relay. In this case, turning the steering wheel all the way to one side or the other may stop the horn, and it won't sound when you press the horn button.
• The horn button in the steering wheel is stuck on or shorted.

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If you can locate and pull relay, do that, if not, pull wires off at horn if you can, otherwise pull fuse. If you have other relays same in area of horn relay (same number on relay) try one of them in that horn spot to see if maybe it's just a stuck relay.If you pull fuse for horn, you may find out something else on same fuse, so make sure you check everything else is working.

The horn button itself is the switch therse power to the horn button and you push the button to complete the cicuit to the horn.if the horn is bolted to the body it is already earthed and requires power to work not earth.