It can be faulty wiper motor or blown wiper control fuse.
Do you hear any kind of noise when you starter the wiper function. If yes then fuse is ok, but issue is wiper motor.
If no movement at all and no noise then its blown fuse or shorted/loose wiper control wiring:-----
For complete troubleshooting i suggest you few helpful links with accurate solutions.
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Click the link below:-------
Complete wiper components replacing details ?
http://repairhelpcenter.blogspot.com/2011/11/complete-wiper-components-replacing.html
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1993 Ford F350 wipers not working?
http://repairhelpcenter.blogspot.in/2012/02/1993-ford-f350-wipers-not-working.html
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How to Replace a Windshield Wiper Motor
http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-windshield-wiper-motor.html
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Wipers not working, but hear relay click on Lincoln LS?
http://schematicsdiagram.blogspot.com/2011/12/wipers-not-workingbut-hear-relay-click.html
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Car windshield wiper gets power for movement and stops?
http://schematicsdiagram.blogspot.com/2011/12/car-windshield-wiper-gets-power-for.html
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How does cars Windshield Wiper System Works
http://technoanswers.blogspot.com/2011/11/how-does-cars-windshield-wiper-system.html
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1997 Honda Protege: Replace Wiper Transmission?
http://technoanswers.blogspot.in/2012/06/1997-honda-protege-replace-wiper.html
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Windshield wiper fluid container leaking?
http://whatisbyme.blogspot.in/2012/05/windshield-wiper-fluid-container.html
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Where is wiper fuse located on1993 chevrolet suburban
http://technoanswers.blogspot.in/2012/02/where-is-wiper-fuse-located-on1993.html
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2002 Toyota Sienna: Wipers and Passenger side Power window stopped working?
http://technoanswers.blogspot.in/2012/04/2002-toyota-sienna-wipers-and-passenger.html
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These details will help.
Thanks.
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