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You will have to remove the wiper arms, then remove the cowl, and then the wiper motor.
Replace wiper motor with a new one. Do not install a rebuilt motor on this vehicle.
Replace the wiper motor with a NEW one (do not use a rebuilt!)
The swith
How to replace Wiper Blades on 2003 Dodge grand caravan ?
If you are like the rest of us and have broken plastic mounts, see "How you do you repair the windshield wiper assembly in a 2003 Saturn Ion?"
Remove the rear wiper arm from the wiper motor. Remove the wiring harness from the wiper motor. Remove the wiper motor retaining bolts. Reverse the process to install the new wiper motor.
You have to take off the wiper arm and then take the nut off of the post that the arm attaches to. On the inside of the van take the trim panel off of the tailgate,then you can get at the bolts that hold the wiper motor onto the tailgate.
Behind the plastic cover on the wiper motor.
Rear Wiper Motor R&R Remove the rear pivot arm. Lift the pivot arm to the upright position. Slide the locking tab out. Pull up and remove the pivot arm. Remove the rear wiper motor shaft nut cover. Remove the rear wiper motor shaft nut. Remove the rear wiper motor cover. Remove the rear wiper motor bracket nut. Remove the bolt and the rear wiper motor. Reverse these steps to install.
Rear Wiper Motor R&R Remove the rear pivot arm. Lift the pivot arm to the upright position. Slide the locking tab out. Pull up and remove the pivot arm. Remove the rear wiper motor shaft nut cover. Remove the rear wiper motor shaft nut. Remove the rear wiper motor cover. Remove the rear wiper motor bracket nut. Remove the bolt and the rear wiper motor. Reverse these steps to install.
The wipers motor has a tendency to become filled with water and short out the internal computer board causing it to malfunction.