horn connected to alarm system?

[Vickie]

When I bought my 84 300SD a few months ago I asked if the alarm worked. He told me it had a short in it so he had it disconnected. When I sat in it a few days later and tried everything the horn did not work. I'm assuming the horn is connected in some way to the alarm system. Is that right? Can the horn be connected in some way bypassing the alarm system? I sure would be more comfortable if I could blast that baby when I needed to! Thanks in advance.