Horn Test/Replacement

Remove the front bumper (see FRONT BUMPER REMOVAL/INSTALLATION )
Disconnect the 1P connector (A) from each horn (B)

Fig 1: Identifying Front Bumper 1P Connector And Bolt
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Test the horn by momentarily connecting battery power to the terminal (A) and grounding the bracket (B) The horn should sound

Fig 2: Identifying Horn Battery Power To Terminal And Grounding Bracket
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If it fails to sound, replace it