Wiper goes off the windshield

Hi.

It's pretty easy, you do not need to know the position, the wiper motor always return to it's origin, just activate the wiper motor by briefly using the washer fluid switch for instance, let it finish it's movement. Next, you want to place the wiper arm with the longest blade on the driver side. Now for the height, most car's wiper sit from 0.5 to 1 inch above the base of the windshield so that should be what you're aiming for, if the wiper arms pinion has splines, try to pick the one closest to the windshield but not too close of course and repeat the same steps for the passenger side. Now you should check the wiper arm operation for collision, incorrect height or travel distance and adjust the wiper arm position accordingly. By the way, if you're lucky your windshield may have mark on the base of the tinting of the windshield to indicate the height of the wiper blade

there is 2 wiper motors . 1 for the drivres side and the other for the passenger. sounds like a bad passenger side motor

There is a tool for that, to take the spring tension off the arm

You can still wrestle it off, by lifting the arm off windshield
& on the arms right side & under it ,is a small tab you slide
out.

Then the arm comes off & you can reinstall in a different place

The wiper arm can be removed and re-positioned for proper travel.

It could be a relatively easy fix or it could take some effort. First, try repositioning the wiper. By flipping up the end cap of the wiper arm and backing off the set screw that holds it on the wiper motor post. Remember, what position it was in by placing a piece of tape on the windshield. Pull the wiper arm off by pulling it off in line ith the angle of the wiper motor post. Take a close look at the splines of both the wiper blade arm and wiper motor. If either is damaged you will have to replace that component. Estimate the amount of adjustment you need and reinstall the wiper blade arm that amount in relationship to the piece of tape. Tighten set screw and try it.
If it still does it but less then repeat the process until you get it adjusted correctly. If there was no change thing it could be the wiper motor and that takes some effort to replace.

All you need to do is to remove the wiper blades of the driver side and then switch on and off the wipe so that the other wiper is seen to work in correct position. Now switch off and in the parked condition, fit back the driver side wiper to the stem.
The wiper must now work

The arm is stripped onto the stud its pressed into which is call a wiper transmission. That part mounts to eack ww blade then to the wiper motor. You need a new transmission and maybe a new wiper are as well

Hi check if the nut is is tight on the wiper handle to the linkage and also check that it did not strip before tightening good luck

hello, this sounds like your wiper transmission got out of alignment possibly due to ice on windsheild.don't really know.short of replacing you could loosen the nut under the cover and move wiper arm back possibly.

I just solved this problem last night with my '05 Impala, and ultimately the solution was what newton5083 stated above.  Yet, it may also be this (I found it online somewhere):
You have bent or broken the "park tab" on the windshield wiper motor bracket. The correct way to fix this is to remove the wiper arms, wiper linkage and wiper motor from the wiper motor bracket, and install a new bracket.
I just bent the tab back into place a couple times for our daughters 2005 Impala but it kept getting bent down again when they didn't take the time to make sure the wipers were not frozen to the windshield, or tried running the wipers to remove heavy snow on the windshield. So yesterday I fabricated a small piece of metal and bolted that to the bracket in the same place the tab stop was.
If someone wants to access this bracket and tab-
1. Use a ½ inch or 13mm socket & ratchet or wrench to remove nuts on wiper arms.
2. They may make a special tool to remove the arms, I used a screwdriver and hammer to tap bottom of the arm to wedge them apart from the spindle.
3. Two small button-looking clips hold the drivers side cowl cover in place under the windshield. These are two-piece clips, pry up the center, than the outer piece.
4. Unclip the washer hose from cowl cover, than pull out plastic cover.
5. There is a smaller plastic cover with on plastic button head holding that cover in place. Gently pry under that clip to remove that cover.
6. Now you can see the wiper trans and bracket. You should see a small tab on that bracket that looks pushed down and bent or possible a square small hole with some torn off metal where the tab broke off.
7. Remove small plastic cover over the wiper transmission and you can see a small spring-loaded arm underneath the wiper transmission assembly.
8. You need to find something to pry that tab back up so when the wipers are running that spring loaded little arm just snaps past the tab running clockwise. It's when you shut off the wipers that the wiper transmission assembly reverses rotation counter clockwise and the small spring loaded arm underneath hits that tab stop, than the wipers will go all the way down and shut off as they should.
Once that tab stop gets bent out of the way the little spring loaded arm has nothing to stop the wiper transmission assembly so it keeps traveling counter clockwise until some other stop shuts the wipers off straight up on the windshield.

There is a revised bracket part # which is supposed to be more durable, GM part #12368639. Here is a copy of the TSB which points out this problem:
Bulletin No.: 05-08-43-003A
Date: March 10, 2005
TECHNICAL
Subject:
Windshield Wipers Park in Up Position (Replace Windshield Wiper Motor Bracket)
Models:
2005 Chevrolet Impala, Monte Carlo
Supercede:
This bulletin is being revised to make a correction to the Parts Information. Please discard Corporate Bulletin Number 05-08-43-003 (Section 08-Body and Accessories).

Condition
Some customers may comment that the windshield wipers park in the out wipe (vertical) position.
Cause
This condition may be caused by a bent park tab on the windshield wiper motor bracket.

Correction
To correct this condition, replace the wiper motor bracket. It will be necessary to transfer the following parts listed below to the new bracket.
^ Wiper transmission
^ Wiper motor crank arm
^ Wiper motor
1. Remove the windshield wiper motor drive system module.
2. Remove the windshield wiper transmission from the windshield wiper motor bracket.
3. Remove the wiper motor crank arm from the windshield wiper motor.
4. Remove the windshield wiper motor from the bracket.
5. Install the windshield wiper motor to the new bracket.
6. Install the wiper motor crank arm to the windshield wiper motor.
7. Install the windshield wiper transmission to the windshield wiper motor bracket.
8. Install the windshield wiper motor drive system module.

A TSB is not a recall, if vehicle is still under warranty the dealer should be repaired for free. If not, you'll have to pay for the repairs.