If you hear clicking near the engine compartment fuse and relay box when the horn pad is pressed, then you need to check the horn fuse,(probably have to look the location up in the owners manual) if the fuse is blown, you may have shorted out horns or a short in the wiring to the horns. Usually there are two horns for the vehicle and if you install a good fuse in the horn circuit then unplug one horn an test the operation the horn may work or the fuse will blow again. If the horn works, disconnect it and reconnect the other and retest,if the horn does not work and the fuse blows, you have found your bad horn. Good luck.