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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.
The wipers have come loose on the shafts. Lift the plastic cover at the end of the wiper blade that attaches to the wiper transmission and turn the wipers on. If the shaft and/or nut is turning, then you can simplt tighten the nut to get them working.
the arm from the motor has popped off. Remove the wiper arms by removing the nut mentioned above and pull up on the wiper slightly while LIGHTLY tapping on the shaft with a small hammer. (Be VERY careful not to damage the threads on the shaft.) Then remove the plastic cowl cover. You will then see the shaft that goes from the wiper motor to the wiper transmission assembly. If it is popped off, it can be popped back on again, but it probably will not stay. It is recommended that you replace the arm.
Place the wipers are in the PARK position, then turn the ignition OFF.
Disconnect the negative battery cable.
Lift up the wiper arm pivot nut cover . . .
It's plastic and just pops up and you slip it off. Next, remove the nut. Once you remove the nut, mark the arm and the shaft or top of the mounting area so you know where to place the arm back on the splines. Then, you use a tool similar to a battery clamp remover and pop the arm off. Installation is in reverse order...just remember to align the splines to the arm.
1. Disconnect the negative battery cable 2. Detach washer hoses, lift the wiper arm covers and mark the wiper arm locations on the pivot shaft for later re-installation. Remove the wiper pivot nut and remove the wiper arms. 3. Remove the cowl cover (from chapter 11) 3a. Remove the wiper arms then remove the screws that hold the lower area of the cowl cover to the wiper module. 3b. Disengage the quarter turn fasteners that hold the outer ends of the cowl cover to the wiper module. 3c. Open the hood and release the wing nuts that hold the front of the cowl cover to the wiper module. 3d. Close the hood but do not latch it. Now remove the outboard screws and lift the cover up enough to get to the washer hose. 3e. Disconnect the washer hose from the right washer nozzle. Close the hood but do not latch it. Lift the cowl cover toward the windshield and off the vehicle. 3f. Installation is the reverse of removal 4.Open the hood. Disconnect the wiper motor electrical connector. 5. Disconnect the windshield washer hose from the coupling inside the unit. Disconnect the drain tubes from the bottom of the wiper unit. 6. Remove the wiper unit mounting bolts. (Picture appears to be three (possibly allen head) bolts) 7. Remove wiper unit. 8. Installation is the reverse of removal. Wiper blade and wiper arm adjustment is measured with the wipers parked; correct adjustment is the lower wiper arm approximately 1.5 inches distance from the cowl cover and the upper arm approximately 2.5 inches from the lower arm. Operate the wiper motor and check that the wiper motor parks when the wiper switch is OFF.
Pivot Shafts and Linkage
The windshield wiper assembly is mounted below cowl top extension (021A36) . Linkages are connected with non-removable plastic ball joints. Windshield wiper mounting arm and pivot shafts are an integral part of the windshield wiper and are serviced as one unit.
Disconnect the battery ground cable (14301). Refer to Section 14-01 .
Remove antenna mast from the antenna base.
Remove cap on LH and RH windshield wiper pivot arms to expose nuts retaining the arms to pivot shafts.
Remove two nuts, one from each of windshield wiper pivot arms . Lift wiper arms to service position, carefully rocking them back and forth to loosen them from the pivot shaft. Lift off windshield wiper pivot arms .
Remove seven screws retaining the cowl top vent panel.
Disconnect windshield washer hose (17A605) at LH side of vehicle just ahead of where it enters cowl top.
Remove hood cowl seal.
Carefully remove cowl top vent panel from vehicle.
Remove three retaining screws to cowl drain tube that is connected to top cowl.
Disconnect wiring harness leading to windshield wiper motor.
Remove five screws retaining cowl top to vehicle and remove cowl top and windshield wiper from vehicle.
Remove two screws and two nuts retaining windshield wiper to cowl top and separate the two parts.
Remove drive linkage from motor shaft linkage.
Remove remaining screws attaching windshield wiper and separate the two parts.
Cowl Top Panel
Nut (2 Req'd)
Windshield Wiper Motor
Screw (2 Req'd)
Windshield Wiper Assembly
Tighten to 9-12 Nm (80-106 Lb-In)
Yes you must remove the arms, to do so, just use a standard screw driver to remove the caps covering the arm securing nuts on the arm drive shaft. The arms are secured on the shaft by splines and you should mark the arms in order to replace them in the exact position they are removed on drive spline. Lift the arms all the way up to avoid the spring tension when removing from the spline. Then you will need to remove the other panels that cover the motor and arm power shafts etc. Hint... disconnect as little as possible to accomplish the swap.