My alarm sat unused and silent for 10 years. One day when battery connecti on came loose I re-tightened it and alarm went off. None of the know trick s to turn it off worked and there does not seem to be a valet switch anywhe re. I have the original manual for the factory alarm and no valet switch i s mentioned.
First step was of course to pull fuse on horn. By connecting battery and w ithin seconds and putting the key in ignition it would start but alarm woul d trip. I searched for a power window fuse since that worked for someone e lse but none in fuse box's. Even pulled every fuse one by one and no luck.
I could hear a relay clicking under the dash on the left side. I removed t he plastic panel in front of drivers door and under dash. Eventually I fou nd offending relay and there was a fuse on the end of two wires next to it. Pulled fuse and cured problem. No alarm and no electric locks. I can li ve with that.