Alarm & Horn
 

My wife was driving my sons '94 Supra & kept clicking the central locking/alarm/immobiliser button on the keyring not knowing that the cen/locking was not working. Now the alarm/horn just keeps going off randomly.Could she have somehow changed the code or something or does it just sound like a wiring fault? All replies welcome as my son is away on holidays & doesn't particulaly like his mother driving his pride & joy!