Visual/Physical Inspection

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Several of the symptom procedures ask for a careful visual/physical inspection. This step is extremely important, it could lead to correcting a problem without further checks and can save valuable time. These checks include the following:

Inspect for aftermarket devices which could affect the operation of the Horn System. Refer to CHECKING AFTERMARKET ACCESSORIES in Wiring Systems.
Inspect the easily accessible or visible system components and harness connectors for obvious damage or conditions which could cause the symptom.
NOTE: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Perform the following if the horns buzz or have a harsh tone:
- Inspect for debris in the joints where the horns fasten to the vehicle.
- Test the torque of the horn mounting hardware. The horn mounting hardware should be tightened to a torque of 10 N.m (7 lb ft).