GM Service Manual Online
For 1990-2009 cars only

Condition

Action

Harsh Tone

Tighten the bolts in the sheet metal mounting area.

Weak, Strained Tone

Remove the foreign object from the horn.

Weak Tone

    â€¢ A weak tone indicates a low current.
    â€¢ Adjust the current. Refer to Horn Current Adjustment .

Low-Pitched Moan

    â€¢ A low-pitched moan indicates a high current.
    â€¢ Adjust the current. Refer to Horn Current Adjustment .

Harsh Vibration

    â€¢ The horn is contacting the sheet metal.
    â€¢ Adjust the bracket in order to allow clearance and freedom from interference.