Poor Tone - Horns

1. Operate the horns to confirm the owner's concern. Refer to Horns System Check.
2. Perform the following general inspections if poor horn tone is evident:
2.1. Inspect for poor terminal connections; repair any poor connections found.
2.2. Inspect for poor ground connections. Correct the poor ground connections if evident.
2.3. Ensure that the horn to horn mounting bracket retaining nuts are properly tightened.
2.4. Ensure that the horn assembly mounting bolt is properly tightened.
2.5. Ensure that the horn assembly is not making contact with any other objects; if contact is being made, reposition the other object correctly or bend the horn assembly bracket slightly if necessary.
3. Operate the horns to determine if the condition still exists. If the condition is still evident, perform the following specific inspections:
3.1. Determine the type of tone produced by the horn assembly:
^ A low-pitch moan (mooing sound)
^ A weak, strained tone
3.2. If a low-pitch moan (mooing sound) is evident, the current is too high and the horn assembly must be replaced.
3.3. If a weak, strained tone is evident, one or both of the horns may contain a foreign object; remove the horn assembly and inspect for foreign objects.
3.4. Remove any foreign objects, and reinstall the horn assembly.
3.5. If no foreign objects were found in either horn, or if the objects could not be removed, replace the horn assembly.
4. Operate the horns to confirm that the concern has been repaired. Refer to Horns System Check. Initial Inspection and Diagnostic Overview