Why would the windshield wiper fuse blow as soon as the ignition switch is turned on in a 1993 Mazda 626 dx and how can this be fixed?

try disconnecting the wiper motor if problem still happens disconnect the wiper switch, if that does'nt work check your wiper control box, a fuse will only blow if there is too much current drawing on it or dead short to earth. try and follow the wires back from the wiper motor check for any damaged wires