What's wrong with my rear wiper? - JeepForum.com
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Unread 12-18-2013, 03:38 PM   #1
Fronzizzle
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1999 XJ Cherokee 
 
Join Date: Dec 2012
Location: Taylor, MI
Posts: 13
What's wrong with my rear wiper?

I'll try to keep this brief...

I bought my 1999 Grand Cherokee used last winter. The rear wiper has always worked fine, though the blade itself was getting worn out.

On Monday, I replaced all three wiper blades - when I did, I noticed that all three wiper arms are worn out, the spring hinge that is supposed to keep pressure on the blade to keep it against the window are shot so the wipers all sit wherever they want. I purchased two new wiper arms for the front, replaced those and problem solved for the front.

For the rear wiper, I didn't think it was as vital so instead of replacing it, I lubed up the hinge and worked it back and forth many times. It seemed to be better, so I replaced the blade. The first time I turned on the back wiper, I heard a "thunk" and then nothing. Upon examination, it appears that the wiper is not "parking" correctly. When it is shut off, the blade is against the rear hatch and under the glass (see picture Park2), and the plastic piece that is mounted on the arm itself is far away from it's dock (see picture Park1).

I assume that because the spring is shot, the wiper was always a little ways away from the car and therefore, would clear the glass when I turned it on. Now that I disturbed it, I can tell something isn't right but I'm not sure what that is. I looked up some pictures, I can't tell if maybe the plastic piece that mounts on the arm is broken and not long enough (in Park1)? Or if the spring being shot is somehow allowing the entire arm/blade assembly to get too close? Any thoughts on what to replace/how to fix?

park1.jpg

park2.jpg

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Unread 12-18-2013, 03:55 PM   #2
Jaketit
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2002 WJ 
 
Join Date: Mar 2011
Location: Port St. Lucie, Florida
Posts: 719
I'm interested also. Mine has been like that since I bought it. I used it once and I was afraid it is going to scratch the rear glass so I never use it.
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Unread 12-18-2013, 04:08 PM   #3
mycreativename
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1999 WJ 
 
Join Date: Jul 2011
Location: Amherst, NY
Posts: 2,137
It looks almost like the blade is too big to me. Like the blade is holding it from getting into the 'parked' position, you know? Do you still have the old wiper? Might be worth throwing it back on there to see if it will work right with that one.

Its also possible that when you were lubing and moving the rear hinge, you might have turned it slightly on the shaft and its turning all the way down.
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Unread 12-18-2013, 08:41 PM   #4
brianestep
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2000 WJ 
 
Join Date: Dec 2010
Location: Westminster, Colorado
Posts: 967
Quote:
Originally Posted by mycreativename View Post
It looks almost like the blade is too big to me. Like the blade is holding it from getting into the 'parked' position, you know? Do you still have the old wiper? Might be worth throwing it back on there to see if it will work right with that one.

Its also possible that when you were lubing and moving the rear hinge, you might have turned it slightly on the shaft and its turning all the way down.
That was going to be my solution. I took mine off to repaint it, and it did the same thing on it's first "cycle" from "off" to "on". Take it back off the shaft and rotate counter-clockwise.
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Unread 12-18-2013, 08:55 PM   #5
JimJ_99WJ
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1999 WJ 
 
Join Date: Mar 2010
Location: Colbert, WA
Posts: 33
this is exactly what happened to my '99 GC. that plastic piece on the arm looks cracked and is supposed to be solid. mine cracked the same way and the problem I had was that it would flex enough (read pivot under the tension of the arm spring) so that it wouldn't be lifted up high enough to clear the bottom of the window and it would get caught and not go any farther. after waaayyy to long trying everything to fix it I replaced the arm (it came with the new plastic piece) and it now works perfectly. the plastic piece looks too short because the arm is rotated up on the splined shaft too far. when you replace it rotate the new one down so it's seated farther down.
hope this helps
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Unread 12-19-2013, 08:13 AM   #6
Fronzizzle
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1999 XJ Cherokee 
 
Join Date: Dec 2012
Location: Taylor, MI
Posts: 13
Thanks for all the responses. I did check the old blade to make sure, it was the exact same as the new one - same make (Anco), model and size. I, too, thought I might have somehow rotated the arm on the shaft. Since the hinge is worn out anyway, I'll replace the arm and when I put it back on I'll make sure to have it up a little further.

Thanks again.
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Unread 12-19-2013, 08:19 AM   #7
99WJ539918
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1999 WJ 
 
Join Date: Aug 2008
Location: , Northern New Jersey
Posts: 1,459
Mine did that when after I bent the arm to make better contract with the window. Try bending in out a little bit. Good luck.
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