Why do my windshield wipers park in the middle of my windshield?
After installing a new wiper motor,
my wipers park in the middle of the
windshield. Is there an easy fix, or
does everything have to come back out?
simply remove the blades and replace at the start position at the bottom of the screen.
make sure the motor has stopped prior to the upward movement of the blades
Wipers going down before up... I had the same problem after replacing a wiper motor on an 01 Cavalier. I needed to readjust the linkage arm on the motor shaft.
I made sure the wiper motor was in its parked position. Then took the nut off the motor shaft and dislodged the short linkage arm from the shaft, then moved the linkage to where the wipers were on the upswing, then reinstalled linkage arm to the shaft and retightend the nut. The linkage was out of sync with the motor. Works great.
You said you just replaced the motor... sounds like you have it a few cogs off on the gear on the motor shaft. You may be able to loosen the motor enough to move the wipers to the proper parked position (without turning the motor shaft) and then put the motor back in place. Then you should be back in sync.
General Motors also has problems with the pulse board module. I have witnessed several cases where an owner thought the wiper motor was bad, and replaced it, but the pbm had also went kaput at the same time. Most FLAPS (Friendly Local Auto Parts Stores) will stock them in new as well as remanufactured versions.
I would still make sure you didn't skip a couple of teeth when you put the new motor in, since this won't cost you any more $, just some of your time.
OK so here is what happens. The blades get stuck for some reason in my case the nut holding the blade on came loose and the blades crossed it could also happen if the blade is frozen to the screen. As the motor continues to try and turn the worm drive in the motor gearbox drags past the nylon gear that senses the park position.
Now if the blade is at either the top or bottom of its total movement then this happens it has the effect of moving the park 180 degrees out of alignment. So to fix it all you have to do is take the small arm off the motor and rotate it 180 degrees. Make sure you hold the the arm still with a spanner while you undo the nut so you know exactly where to rotate the arm to.
Holy Cow! What a bunch of horrible answers.
The reason for the wiper blades stopping in the middle is that the stop switch, inside the motor assembly, is not parking the wipers in the required position. It is the new motor that is faulty.