Saturn 84501948 Horn Assembly, Single (Low Note)

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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 horn terminal with a jumper wire; if the horn doesn't sound, replace it. If the horn does sound, check for voltage at the terminal when the horn button is depressed. If there's voltage at the terminal, check for a bad ground at the horn. If there's no voltage at the horn, check the relay located in the under hood fuse/relay box. If the relay is functioning, check for voltage to the relay power and control circuits; if either circuit is not receiving 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 pad for continuity to ground. If there's no continuity, check the circuit for an open; if there's no open circuit, replace the horn pad, which is an integral component of the driver's airbag module. If there's continuity to ground through the horn button, check for an open or short in the circuit from the relay to the horn. For replacement, remove the left headlight housing to access the horn, which can also be reached by removing the left front inner fender splash shield. Disconnect the horn wiring and remove the horn, then installation is the reverse of removal.