I'm having problems with front wipers on a 97 Grand Caravan, they don't move, just make a loud buz/hum. Took off the wiper arms and their splines look fine. Took off the
cowl and with the wipers 'on', I can get the whole scissor mechanism to move if I push it lightly. I'm thinking that considering how strong the motors are, this little push shows that the scissor mechanism isn't binding but ...