Question about 2004 Chevrolet Impala
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Posted on Jan 02, 2017
SOURCE: windshield wiper problem
this could be a result of the linkage coming apart this is located under the cowel and not easy to service. It could also be a result of bad splines between the wiper arm adn wiper arm shaft. if the later is the case you can sometimes tighten the 15 mm nut that holds the arm to the shaft. but this will only work once or twice before the arm requires repolacement. remember folks, wipers are your friend in the winter, they are not ice chippers or snow plows, always clear your windshield with an ice scraper and make sure the wiper blades are not frozen to the glass. this small form of torture in the cold will save you big $$$ in the auto repair shops.
Posted on Dec 10, 2008
SOURCE: my driver side windshield wiper
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
Windshield Wipers Park in Up Position (Replace Windshield Wiper Motor Bracket)
2005 Chevrolet Impala, Monte Carlo
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).
Some customers may comment that the windshield wipers park in the out wipe (vertical) position.
This condition may be caused by a bent park tab on the windshield wiper motor bracket.
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.
Posted on Jan 08, 2009
SOURCE: Wiper arm not moving
Check the splines on the post where the wiper are mounts and make sure they are not rounded off. If they are intatct, remove the cowl (sheetmetal between the hood and windshield) and check the mechanical linkages that connect the wiper arms together
Posted on Mar 25, 2009
you need to remove both the wiper arms. Take off the rain seal from under the windshield. remove the cover underneath you will find the rod has worn and dropped off you must get a complete new mechanism. Or if you cant afford to do that re attatch the rod to the buckle pin on the wiper arm and use some insulation tape to make a temporary repair till you can get a new one.
Posted on May 13, 2009
There is a bar that connects both your windshield wipers together check that to see if it is broke or has come unscrewed. Should be underneath the hood upagainst the firewall.
Posted on Sep 22, 2009
Testimonial: "Thank you. That was the problem the bolt was loose"
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