Hi,
This sounds like a clock spring to me. I attached some detail about this to try and explain it a little better.
https://www.2carpros.com/articles/symptoms-of-a-bad-airbag-clock-spring
More than likely when you turn it is making contact and the horn contacts are stuck so when they make contact it sends the signal to the horn. I included the process on how to replace it if you agree that this is your issue.
Let me know if you have questions and we can go from there. Thanks
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Tuesday, October 8th, 2019 AT 5:25 PM