Windshield wipers don't work right. Try to and quit mid cycle.

might be someone took the whole arm off to paint em or whatever so while they are in the off position check to make sure they don't need a quick adjustment for example if they are flat/level with the windshield lower seal if they are than you got the wrong size blades if they are off a little than remove clip holding the windshield wiper arm and slide off of the cog and move it a couple teeth till its flat than check your work by turning the wipers on if they aren't perfect than keep adjusting till they are on both sides

the wiper control arms bushings are worn out and need replaced..

wiper nut and slot is damaged.

The wiper motor is located in the left rear of the engine compartment near the corner by the driver side. Remove the wiper arm assembly (both if necessary) and then remove the plastic cover at the edge of the hood near the windshield the motor is underneath. To remove the wiper arm flip up the small cover where the arm is attached and you will find a (12mm usually) nut. Remove the nut and work the arm off of the post using a rocking motion. Hope this helps.

You can purchase a self locking nut with a nylon washer for a few cents.

You haven't got the arms lined up properly. Remove the arms from the spindles and rotate them to the bottom of the windshield.

tTHIS SHOULD BE DON IN >WIPER-PARK POSITION ONLY WIPER-PARK = OFF POSITION

I had this same problem. The wiper blades would extend too far and hit the edge of the car, or they wouldn't extend far enough and only wipe about 3/4 of the windshield. The problem was a broken Wiper Rod A. My local mechanic replaced it - the part was about $20 and the labor about $230. Have them look at wiper rod A

Remove the wiper blades then remove the cover and you will find that the linkage has come off the motor.Replace the linkage or fit a new one.Hope that was helpfull.

they have what one guy, I know called a small "transmision" that engages both wipers and the speed. On one car the winshield wipers transmission connections were loose. A small bolt came off.
Check all the workings by running the wipers .
Try to get to the wiper motor assembly and take a look at it. You may have to remove some screws.