Good afternoon,
I attached a wiring diagram for you to view. The trigger for the relay is the wire to the horn switch on the steering wheel. You need to remove the cover and test the wire for power.
I would use a voltmeter to verify battery voltage. If you do not have voltage, you need to go to the clock spring below the steering wheel as that passes the voltage to the switch.
https://www.2carpros.com/articles/how-to-check-wiring
https://www.2carpros.com/articles/how-to-use-a-voltmeter
I attached the procedure for the replacement of the clock spring. That is a very common failure for no horn.
Roy
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Saturday, July 3rd, 2021 AT 12:35 PM