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Re: 2005 V70 Estate Wiper motor access
It's actually not that hard, just be carefull not to crack the windshield.
Remove the wiper arms 13mm nuts and the four to five plastic rivets in the black cowl. using a small punch push the center of the rivets all the way through and pull of the larger outside ring. Last but not least there are two push pins on the far left and right sides of the black cowl cover. Pull up on the pin and it will come loose. Well if you can understand what I've written.....
Now lift up on the front (side towards the engine) and pull it to the front of the car.
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My 2005 tahoe rear wiper was inop. The symptom was a pulsating buzz coming from the wiper motor, but no wiping action. I mistakenly bought a new wiper motor, which was not the cause. It was a bad ground, so instead of hunting the bad ground, I just added another grounding wire to the motor. Maybe my experience can help you. Make sure ignition is off and wiper is off. (As an added safety precaution disconnect the negative battery cable to prevent unexpected wiper action). To get access to wiper motor, open rear window glass to remove upper window trim surround. On either side of the window latch there are two black flat plastic "buttons". Release these by pushing from behind with a flat blade screw driver to pop out the center pin. With the pin extended the whole button can be pulled out. Open the tail gate and gently pry under the upper window trim to release clips from underneath. Remove upper window trim. Now to remove lower tailgate panel, remove bolt holding the pull strap. remove pull strap. As before gently pry lower panel to release clips from underneath. When all are loose, lift panel vertically to remove, by releasing the two "fingers" that fit into slots. Now that the motor is exposed, cut a short length of insulated stranded wire (like lamp wire) and crimp-on some terminal ends(just the stripped bare wire ends will also work). Attach from under a wiper motor frame mounting bolt (do not use either of the rubber insulated bolts) to under a mounting bolt on the window glass latch assy. Or you can also select any motor grounding point to any vehicle chassis grounding point as desired. Op test the wiper. Note: The window glass and tailgate will have to be closed to test. Hopefully it works properly. Put everything back in reverse order. Remember to slide fingers of lower panel into their slots before pushing clips secure. Also after remounting upper glass trim, fully insert the two plastic latch buttons with center pins extended, and then push in center pins.
The windshield wiper linkage comes as an assembly. The assembly comes with the two rotating splines that the wiper arms attach to. you must remove wiper arms. Remove cowl trim and remove bolts that hold the pivot points to the body. The new linkage that snaps to the wiper motor should come with a new retaining clip. You have to fish the linkage assembly through the access holes in the body by un bolting the wiper motor.
You are probably correct in thinking its the wiper motor. You can do this but you will need to remove all the interior trim from the rear hatch first. Get a trim clip removal tool at a parts store...it will work much better than just a flat blade screwdriver. You'll have to remove the trim panels starting in order from the top of the door, then the left rear window side trim, then right rear window side trim, then the grab handle, and finally the main rear hatch trim panel. Once inside, removing and replacing the rear wiper motor is easy. You'll start by lifting the cover on the wiper arm retention nut. Remove this nut to get the wiper arm off, then remove the nut under neath which is the motor shaft mounting nut. Now, back inside to remove the other 3 motor mounting bolts. Don't forget to disconnect the connector for the motor wires. Reverse steps to replace.
Remove the rear pivot arm; refer to Pivot Arm—Rear .
Remove rear pivot arm.
Lift the pivot arm nut cover.
Remove the nut.
Remove the pivot arm.
Remove the liftgate door trim panel; refer to Section 501-05 . Remove the (A) liftgate handle to liftgate screws and the (B) liftgate handle. Remove the liftgate trim panel screw access plug. Remove the screw.
Remove the liftgate door trim panel.
Use Windshield and Molding/Trim Removal Kit to remove the liftgate door trim panel from the liftgate window opening.
Push the liftgate door trim panel toward the top of the liftgate and remove the liftgate trim panel.
Position the watershield aside to gain access to the rear wiper motor.