The only sound that occurs when the horn button is pressed is a clicking noise from beneath the hood. This could mean that:

• A. there is an open on the contact side of the horn relay.
• B. the horn is burned out.
• C. the fuse for the horn is blown.
• D. the wiring to the horn is reversed.

Answer: (B)

When you press the horn button and only hear a click from under the hood, the relay coil is getting power and operating, but the horn itself isn’t producing sound. That points to a fault in the horn element itself—it's likely burned out or open circuit. The control side is working enough to pull in the relay (hence the click), but there’s no acoustic output because the horn coil or diaphragm isn’t functioning.

If the fuse were blown, the coil wouldn’t energize and you wouldn’t hear that click. Reversing wiring usually doesn’t prevent the horn from sounding, since many horns aren’t polarity-sensitive. An open on the relay’s high-current side could also cause no horn sound despite a relay click, but the most common, straightforward explanation for a click-without-sound symptom is a bad horn itself.