I'm troubleshooting a door noise problem of my own (another thread), and came across this in the 94 Service Manual that sounds more like your problem:
Page 8Q-3 VEHICLE THEFT SECURITY SYSTEM - SYSTEM SELF-TESTS
" A diagnostic mode is available in the system to verify operation of all monitored switches or circuits. To enter diagnostics, cycle the ignition key to the accessory position 3 times, leaving the key in this position.
Upon entering diagnostics, the park and tail lamps will begin flashing to verify their operation. In addition, the horn will sound twice to indicate its proper operation. Returning the ignition switch to the OFF position will stop the lamps from flashing while keeping the system in diagnostics.
....
(3) Cycle the key to the ignition RUN position. A single horn pulse will indicate proper operation of the ignition input. This will also take the module out of the diagnostics mode. ..."
Your car may have been in this diagnostic mode. ??