Check the play of the release bearing by spinning it by hand. If there is excessive play or noise, replace the release bearing.

NOTE: The release bearing is packed with grease. Do not wash it in solvent.
Horn Test/Replacement
'09-11 models
Remove the front grille cover.
Disconnect the 1P connector (A) from the horn (B).
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"Honda_SymbolMark ...
Fuses
The vehicle’s fuses are contained in three fuse boxes.
The interior fuse box is behind the driver’s coin tray. To access it, remove
the tray by turning the dial counterclockwise then pulling ...
USB Commands
USB play
USB play track # (#: 1 to 30)
USB skip forward
USB skip back
USB track random*
USB track repeat*
USB track scan*
USB folder up
USB folder down
USB folder random*
USB folder repeat*
...