That click is probably the horn relay. I'm not exactly sure where it is located on your generation. Check the fuse/relay box under the hood to see if there is a relay there for the horn. If you find it, have someone honk the horn for you while you stay under the hood and see if it's that relay ticking. If it is ticking, then the problem is most likely the horn itself or the wiring to it. You can back-probe the horn's electrical connection with a 12 volt test light or a digital volt/ohmeter, while someone honks it. Jut check for 12 volts. If you get 12 volts there, the horn itself is defective. Try a salvage yard for a replacement.
Mike
Mike