How do you stop a car horn in a Saturn from going off by itself?

To stop a car horn in a Saturn from going off by itself, first check if the horn button is stuck or if the key fob is malfunctioning. Inspect the steering wheel for any issues with the airbag or horn wiring. If the problem persists, disconnect the battery to temporarily disable the horn until you can diagnose and fix the underlying issue. Consulting a mechanic may also be advisable for a more thorough inspection.