Horn Test/Replacement

Remove the front bumper '00-03 models (see '00-03 MODELS ); '04-09 models (see '04-09 MODELS ).
Open the hood ('02-09 models).
Disconnect the 1P connector (A), and remove the horn (B).

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

Fig 2: Connecting Battery Power To Terminal
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If it fails to sound, replace it.