This guide will require you to splice or tap into a specific wire for the horn. Looking at the diagram above, the horn wire for your vehicle is yellow/red or yellow/light-green. Locate the OEM horn under the hood and look for a two-wire connector going into the horn. The wires may be wrapped an an electrical tape of some sort. Peel the tape back to reveal the two leads. Look for the yellow wire.
Use the included T-tap connector to splice a new 18-gauge lead off the yellow horn wire. The negative lead is black. Do not splice into the black wire. If you're not sure about how to do this, please see the following video.