Well, I tracked the wires that the alarm installer had coming through the firewall. One went to the siren and one went under the cover of where the coils are. The idiot just ran the wire under the side of the cover, so when it was bolted down it was putting considerable pressure on the wire. I guess the heat and pressure only took a few days before cutting through the shielding and contacting the metal below the cover with bare wire. I repaired the wire and then ran it through where the other wires enter under the cover. No more short, everything runs like a champ, and my alarm works like it should. Thanks for all the help guys. I appreciate it. One more reason to do everything myself.