The wiper arm on the driver side does not move, but the passager side does. I tight the nut on the drive side down it help for a few days but its doing the same thing... are there theard on both the arm and the part you screw the nut on to? Because there are not any on the part where the nut goes on... 2004 chev Blazer
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I have the same problem. When I removed the drivers side wiper arm, I found that the nut that held the arm in place was only finger tight, which allowed the arm to raise slightly off the splined shaft. This caused the shaft to strip the splines out of the wiper arm.. after inspecting and cleaning the shaft, it appears that the splines on the shaft are still in decent shape. You may need to only replace the wiper arm. About $50 at a few online toyota parts sellers. replacing it is simple and requires only a flat blade screwdriver to remove the black cap off the nut, and a wrench to remove and replace the nut. simply remove the nut, and pop off the wiper arm. push the new arm onto the splined shaft pointing the same place as the passenger side wiper, then tighten the nut down. I would also suggest wiping the metal shavings off the splined shaft with some sort of abrasive pad, like scotchbrite, before putting the new wiper arm back on. I hope this helps.
There are nuts on the wiper arm posts under plastic caps[ if still there ] they looen sometimes and the arm won't move turn off the wipers so the 'park' and check the nut for tightness - should be quite snug. it that dosen't fix it then you have a linkage problem from the motor.
The base nut needs to be tightned, with the key on and wipers off, now turn key off and position wiper in the park position (down) then tight the nut,remove the cover at the bottom of the arm to see nut,
At the bottom of the wiper arm, there's a flip up cap, flip that up, could be abit tight, and you should see a nut holding the wiper arm on the motort shaft. undo the nut, take the wiper arm off and replace is what appear a better position. May take a couple of trys to get it right.
it seems the motor is working ok so it only leaves your linkage or the actual wiperarm mounting to fault.remove the retaining nut on the drivers side wiper arm usually a 12 or 13 mm spanner.once removed turn wipers on and keep hands clear, look at the drivers side spindle,if it turns when the other wiper moves your linkage is ok and you need a new arm, if it dosn't move then its your linkage,hope this helps!
some wiper arms fit over a splined pivot post. When you tighten the nut down, the splines cut into the wiper arm thus holding it tight and keeping it from slipping on the post.
You may just need to tighten the wiper arm down r replace the wiper arm. Does it have a cover that you can rotae up and expse the nut?