http://www.ehow.com/video_4936070_install-windshield-wiper-motor.html?pid=1&cp=1 (this is very informative video on how to remove and replace a windshield wiper motor)
How to replace wiper motor on a 1998 montero sport mitsubishi
You begin to remove the windshield wiper motor by removing the cowl. Disconnect the wiper unit drain tubes and remove the mounting bolts. Replace with working unit
You will have to remove the wiper arms, then remove the cowl, and then the wiper motor.
wiper motor on lincoln towncar 02
How do I replace the windshield wiper switch?
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.)
Remove the wiring harness from the wiper motor. Remove the windshield wiper arm from the wiper motor. Remove the wiper motor retaining screws. Reverse the process to install the new wiper motor.
The windshield wiper motor is under the front cowl. After removing the cowl the motor should be easily accessed for replacement.
Unbolt the roll bar from the windshield. Lower the windshield. At this point you can unbolt the motor and replace it.