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Have to remove the wiper arm & see if the splines are damaged & if the motor works as it should There are no easy vehicle fixes You have to understand how something works & then diagnose why it doesn't & make the repair If you get lucky she only ruined the wiper arm & not the motor or it's drive spline.
That rear wiper arm is a hard to get parts from any replacement store, the only one can supply it is the dealer themselves. ( it happens to me too ).
If you have no access to the dealer, you could make them, by buying a normal wiper arm, cut it off for the size you wanted, heat up to the point where you need to bend it, and find any wiper blade with a clip-on-installation.
Hope that helps you out!
Try to run the motor without the wiper arms tightened down and turn it off so it can cycle down to its rest state. Then install the wiper arms.
Make sure, that the car's windshield wiper wiring is correct for this motor.
--- Wiper Arm & BladeRemoval & InstallationFrontTo Remove: CAUTION When the wipers are parked (off), the driver’s wiper arm must be above the passenger’s wiper arm.
Remove the clip holding the outside end of the wiper arm cover to the arm.
Lift the arm cap up to expose the nut.
Remove the wiper arm mounting nut.
Using a suitable two jaw puller, remove the wiper arm from the wiper pivot.
Verify that the wiper motor and linkage are in the parked position.
Place the wiper arm in position over the wiper pivot.
Install the nut to hold the wiper arm to the wiper pivot. Torque nut to 26 ft. lbs. (35 Nm).
CAUTION Make sure to tighten the wiper arm nut properly.
Push the arm cap cover down.
Secure the clip holding the cover to the wiper arm.
A new wiper motor assembly comes with the linkage arm installed.
Before servicing the vehicle, refer to the Precautions Section.
Remove the windshield wiper mounting arm and pivot shaft
Do not remove the wiper motor linkage arm from the wiper motor
assembly. If the arm is removed, the wiper arms may not park in the
Use a suitable tool to separate the wiper linkage arm from the wiper mounting arm and pivot shaft assembly.
Remove the 3 bolts and the wiper motor.
Fig. Wiper motor and linkage
Install wiper motor and bolts.
Tighten wiper motor bolts to 10 ft. lbs. (13 Nm).
Install windshield wiper mounting arm and pivot shaft.
Check wiper operation.
Rear Wiper Motor - Removal & Installation
Remove the rear pivot arm.
Remove the rear wiper motor shaft nut cover
Remove the rear wiper motor shaft nut.
Open the lift gate window.
Remove the rear wiper motor cover trim panel.
Disconnect the electrical connector.
Remove the 2 rear window wiper motor nuts
Remove the rear window wiper motor.
Fig. Rear wiper motor view-2008 model shown, other years similar
Install rear wiper motor and tighten mounting nuts to 62 inch lbs. (7 Nm).
Reconnect the electrical connector.
Install wiper motor cover trim panel.
Install rear wiper pivot arm tighten nut to 53 inch lbs. (6 Nm).
Raise the rear wiper blade to the position as shown in the
illustration where the meshing of the claw disengages with a clicking
sound. NOTE: Be careful not to break the claw.
Pull straight the rear wiper blade to vehicle's left from the wiper arm. NOTE: Do not fold the rear wiper arm with the rear wiper blade removed from it.
REMOVE REAR WIPER RUBBER
Place the rear wiper with the rear end of the rubber protruded from the blade stopper as shown in the illustration. NOTE: Do not pull out the wiper rubber forcibly, as the backing plates will become deformed or the blade claws will become damaged. HINT: The rubber can be easily pulled out by pushing the middle area of the blade.
INSTALL REAR WIPER RUBBER
Install the 2 wiper rubber backing plates to the rear wiper rubber. NOTE: Be careful to observe and keep direction of curvature for correct replacement.
b. Insert the rear wiper rubber from the claw of the middle of the rear wiper blade into the rear end position.
c. After passing the rear wiper rubber through the rear end side claw,
protrude it from the rear end stopper and pass it through the front tip
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.
Wiper arms are fitted to a tapered and splined shaft and they can become very tight on the shaft even without the problems of poor maintenance - when servicing a vehicle I always loosen the wiper arm retaining nuts and apply a small amount of chain lube and retighten. Subsequent removal becomes a little easier and the chance of snapping a wiper spindle much reduced.
These days few wiper arms can be removed without using a small gear puller that is sold by tool outlets for the purpose of removing most wiper arms. Recently a colleague needed to manufacture a "special" for a particular car because mine wouldn't fit.
Rear wipers receive no maintenance at all generally and being more exposed to the weather, salt, road dirt, corrosion can be a big factor when removing the arm from the spindle. This is especially so when the rear wiper arm is plastic with a moulded-in ally hub. I have in the past had to resort to carefully cutting and grinding away the arm in order not to risk the spindle or the glass.
I suggest you try a wiper arm puller and a little gentle heat and if that doesn't seem to be working then cutting, grinding or drilling would be the best solution, after protecting the glass with lots of forgiving material...
There is a clip on the base of the wiper arm that swings out. Then you just lift the wiper arm up and off. Very simple once you know what to do. ( no, I'm not that smart. A guy at NAPA showed me how to do it.) Hope this helps. B.