Honda 8-94329-560-0 Horn, Dual Tone (High)

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Before beginning electrical diagnosis, check the fuses. First, disconnect the electrical connector from the horn. To test the horn, connect battery voltage to the two terminals using jumper wires; if the horn doesn't sound, it needs to be replaced. If the horn does sound, check for voltage at the terminal when the horn button is depressed. If there's voltage at the terminal, inspect for a bad ground at the horn. If there's no voltage at the horn, check the relay, noting that most horn relays are either the four-terminal or externally grounded three-terminal type. If the relay is functioning, check for voltage to the relay power and control circuits; if either circuit lacks voltage, inspect the wiring between the relay and the fuse panel. If both relay circuits are receiving voltage, depress the horn button and check the circuit from the relay to the horn button for continuity to ground. If there's no continuity, check for an open circuit; if there's no open circuit, replace the horn button. If continuity to ground exists through the horn button, check for an open or short in the circuit from the relay to the horn. To replace the horn(s), remove the radiator grille, disconnect the electrical connector, and remove the bracket bolt to detach the horn for models from 1997 and earlier. Installation is the reverse of removal.