To perform this, engage the parking brake, jack up the front part of the car and place it on a couple of stands. The horn terminal is located under the bumper, so remove the wiring connector, there is also a bolt that will keep you company. To disassemble these components, remove the mounting bolt(s) and take out the horn or its mounting bracket from beneath the car. For installation reverse all the procedures mentioned above, be sure to tighten the horn unit mounting bolt to manufacturers recommended torque and position the horn unit mounting bracket correctly.