Hello there,
You could have several problems, but the most likely is a shorted wiper motor armature. I'd first recommend doing a visual inspection of the wiper motor and wire connection. This will uncover any obvious wire damage. Also, could be the switch itself. Does the rear wiper motor work? I think it's fused separately. Probably looking at a new motor or try a local junk yard. They seem to be really reliable motors. Hope this helps. HJK