It is hard to replace it yourself, and without professional help you would probably put it on wrong, I would suggest seeing a pro. Do you just want to replace the wipers?
How do I replace the windshield wiper switch?
Replace the locking tab on top of the wiper
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To fix windshield wipers on a Volvo 940 try using new wiper fluid and cleaning the windshield and wiper blades before you replace the blades. It is also important to replace wiper blades regularly.
How to replace wiper motor on a 1998 montero sport mitsubishi
yes
No
Replace wiper blade and carefully bend wiper arm so it makes good contact with windshield
The windshield wiper arm is held in place by a retaining clip. Hold the retaining clip in and the windshield wiper arm will come off. Put the new windshield wiper on and read lease the retaining clip.
You will have to remove the wiper arms, then remove the cowl, and then the wiper motor.
http://www.ehow.com/video_4936070_install-windshield-wiper-motor.html?pid=1&cp=1 (this is a complete video on how to remove and replace a wiper motor...very informative.)