If a technician finds that a horn relay is stuck closed, what symptom will the vehicle exhibit?

When a horn relay is stuck closed, it will continuously allow electrical current to flow to the horn. This results in the horn being constantly activated, which is why the vehicle would exhibit the symptom of the horn continuously blowing. The relay functions as a switch that controls the connection between the battery and the horn; when it is closed, the circuit remains complete, causing the horn to sound until power is disconnected or the relay is repaired. Understanding how relays function and their role in controlling electrical devices helps in diagnosing issues like this one, where the behavior of the horn directly correlates with the state of the relay.