Hi John,
Are you talking about the part of the horn that actually produces the sound? If so, it will be a little speaker in the engine compartment. Unfortunately there is not a diagram that shows them but the wiring diagram lists they are in the left and right front lower side of the engine compartment.
I attached a picture of what they look like.
If you are referring to another component please let me know.
Images (Click to make bigger)
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Tuesday, June 4th, 2019 AT 8:54 PM