Examination
1. Disconnect the plug while pressing on the side wire clips. Unscrew the fastening nuts and remove the horn.
2. Using additional wires, connect the horn directly to the battery. The horn should work.
3. You can try to restore a faulty or poorly functioning signal by turning the adjusting screw (arrow) torx screwdriver, size T20, on the reverse side. First, the sealing compound must be removed from the screw head. After adjustment, reapply body sealant to the screw head, protecting it from moisture.
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