If its like a 96 you remove the windshield wiper motor and assembly
On a 1997 Plymouth Voyager, the relay for the rear wiper is found under the hood. It is in the fuse housing on the passenger side.
On a 3.3 or 3.8 you may have to remove the wiper cowling to access.
You have to remove the wiper cowl assembly, and the alternator mounting brackets.
Not sure if the 95 and 99 Voyagers are the same, but on a '99 Voyager to remove the rear wiper arm, you have to lift a tab that is to the right of the circular cap. You have to raise the wiper arm off the glass then pry the little tab up. After the tab is raised, you can wiggle the arm off the wiper motor.
Bent or misinstalled wiper arms.
Just grab the wiper arm and lift, its only like spring loaded, just lift it, remove old wiper and replace.
28", I just replaced mine
All 1996-2000 Plymouth Voyagers take 28" replacement windshield wiper blades on both sides front.
Under the black cowling at the base of the windshield.
Remove the door panel and check for power and ground at the motor connector. If you have both power and ground the motor has failed.
The 1999 Plymouth Grand Voyager takes a fairly standard 18" rear wiper blade (also takes 28" replacement windshield wipers on both sides front). Additionally, the installation process is simple. The replacement wiper blades will come with step-by-step, illustrated removal and installation instructions.