WHERE IS THE HORN LOCATED ON A 1996 CHEVROLET CAVALIER UNDER THE HOOD

Did you look on the radiator panel (the same piece of sheet metal the radiator is mounted to under the hood) ? It will probably be facing sideways or down somewhere out front in that area.

Not sure what I'm looking for related to the horn.

Had the same prob.. Remove passenger side headlamp, it's hiding down in there. Car sits low to the ground so its probably "easier" (seems as if there's nothing "easy" when it comes to working on cars...) If you're like me and have more time than money, make sure you've got everything you need and just Go For It! Good luck!