What Causes the Horn to Keep Sounding Nonstop?

[AlyssaDella]

When a car horn keeps sounding continuously, it is generally due to the horn button on the steering wheel being stuck in the pressed position, keeping the circuit constantly energized. Another common cause is the relay contacts becoming welded together and failing to disconnect properly, resulting in continuous contact. Additionally, a short circuit in the horn's negative switch wire grounding can also cause this issue. Below is expanded information: While driving: Avoid prolonged horn usage. Also, when pressing the horn button, do not apply excessive force or brute strength, as this is how most horns get damaged. During car washes or rainy days: Take measures to prevent the horn from getting soaked with large amounts of water. If water ingress is discovered, promptly dry it off. About relay contacts: Relay contacts exist in either normally open (NO) or normally closed (NC) states, which can be simply understood as switch contacts that connect or disconnect signals. The performance of contacts is influenced by factors such as contact material, contact pressure, load type, operating frequency, atmospheric environment, contact configuration, and bounce characteristics.