On the front right hand side below the bumper. More precisely, it is behind the right front wheel well covering. The wheel well covering is in sections, only the very front section needs to be removed. About a dozen 3/8" screws secure it around the leading edge and under the bumper. A 10 mm nut holds the horn to its mounting bracket/ground.
I have a '96 Cavalier and I'm having horn issues. Mine was located behind the front bumper on the passenger side. It is almost in the bumber itself.
On my '96 Cavalier, the horn is located in the front driver side wheel well. I had to jack it up, remove the wheel, and then access panel inside the well to get to the horn.
The diagram for the 96 Cavalier horn placement can be found in the Cavalier service manual. The manual can be bought in most auto parts.
On the passenger, inside the fender well on my '96. There are a few screws/clips to remove which hold the plastic fender well on. The horn is located in front of the tire.
Have your Chevy dealers parts department print out a picture of the parts location for you. They will do this if you ask.
The horn is under the hood in front of the radiator. to be more specific it's in the front right corner, at least on my 96 LS 4 door it is...may have to undo some inner fender screws to get to it...i'm installing an air horn that is activated when i press the horn on the steering wheel :)
The 1996 Chevrolet Cavalier headlight module can be found on the firewall, in the engine compartment. The module will be on the drivers side of the firewall.
The 1999 Chevrolet Cavalier dashboard is held on with retaining clips. There are 12 retaining clips. Pry up on each retaining clip to remove the dashboard.
I have a -96, and if they are the same, the horn is located in the front, at the right side, in the bumper. You may have to remove the AC to get to the horns, at least I had to on my -96. It's worth a look =) Good luck!
1-2 located by the exhaust manifold
It's on the corner of the steering wheel. With little horn signs. It's not in the middle of the steering wheel.
Behind the grill on the passenger side. It is a very small horn that is hard to see.