Welcome to 2CarPros.
What were you working on, where approximately did the wire fall from, and what color is the wire?
I attached a pic of the audio switches on the steering wheel. See if any of the colors match what you found. As far as the horn, it should be a green or green and white wire.
Let me know what else on the steering wheel isn't working. For example, cruise control.
Let me know.
Joe
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Saturday, September 14th, 2019 AT 7:53 PM