How do you replace rear wiper motor 1999 astro van?

To replace the rear wiper motor on a 1999 Astro Van, first, disconnect the vehicle's battery to ensure safety. Remove the interior trim panel from the rear door to access the motor, then disconnect the electrical connector and unbolt the motor from its mounting. After installing the new motor, reattach the electrical connector, secure it in place, and reassemble the trim panel before reconnecting the battery. Test the new motor to ensure it functions properly.