Horn: Testing and Inspection
Horn Test/Replacement
1. Remove the front bumper Front Bumper Removal/Installation.
2. Disconnect the 1P connector (A) from the horn (B), then remove the bolt (C).
NOTE: The horn (low) is shown; the horn (high) ('08-11 USA Si models) is similar.
3. Test the horn by momentarily connecting battery power to the terminal (A) and grounding the bracket (B). The horn should sound.
4. If it fails to sound, replace it.
5. Install the horn in the reverse order of removal.