If the linkage is turning, then I suspect either you didn't tighten the nuts that hold the wiper arm on to the post or somehow the post or arm is stripped.
If you look at pic 1, I highlighted the nuts I need you to check first. If they are loose, tighten them. If they are not, remove one and inspect the splined fitting on the arm and on the post to make sure nothing is stripped.
Here are the directions for installing the wiper arms. They need to be positioned prior to installation. The remaining pics correlate with the directions.
2014 Dodge or Ram Truck Grand Caravan V6-3.6L
Front Wiper Arm - Installation
Vehicle Wiper and Washer Systems Wiper Arm Service and Repair Removal and Replacement Front Wiper Arm - Installation
FRONT WIPER ARM - INSTALLATION
Be certain that the wiper motor is in the park position before attempting to install the front wiper arms. Turn the ignition switch to the ON position and move the multifunction switch control knob to its OFF position. If the wiper pivots move, wait until they stop moving, then turn the ignition switch back to the OFF position. The front wiper motor is now in its park position.
The front wiper arms (2) must be indexed to the pivot shafts (5) with the front wiper motor in the park position to be properly installed. Position the wiper arm pivot end onto the wiper pivot shaft so that the lower edge of the wiper blade (1) is aligned with the wiper alignment lines, which are horizontal T marks concealed in the upper margin of the lower windshield blackout area.
Once the wiper blade is aligned, lift the wiper arm away from the windshield slightly to relieve the spring tension on the pivot end and push the pivot end of the wiper arm down firmly and evenly over the pivot shaft.
Install and tighten the nut (4) that secures the wiper arm to the pivot shaft. Tighten the nut to 26 NÂ m (19 ft. Lbs.).
Wet the windshield glass, then operate the front wipers. Turn the wiper switch to the OFF position, then check for the correct wiper arm position and readjust as required.
Reinstall the plastic nut cap (3) onto the wiper arm pivot nut.
Let me know if this helps or if you have other questions.
Images (Click to make bigger)
Thursday, December 3rd, 2020 AT 6:20 PM