KLR

I tried out the rear wiper this afternoon for the first time since I bought the car a year ago to make sure that it still works. It works great, but when you shut it off, is it supposed to return to the vertical "park" position or is it supposed to just stop dead in its tracks? Mine obviously does the latter. Just wondering if it was designed this way, or if there is a switch or something in the motor that needs some fiddling.

AznDrgn

the two that I have seen stop where you turn them off.

schnellfahrer

Mine returns to the up position.

Nabeel

Mine returns to the up position as well.

Porsche-O-Phile

Same here - I believe it's supposed to complete its "sweep" and then park. Both of my 944s do that.

KLR

Hmmm... anyone know how it accomplishes that? I couldn't find anything on this in the archives.

marky522

I have replaced them on other cars, and i was told they start to do this because a ground burns out inside from people using them when they are frozen to the windshield.
HTH
MArk

KLR

Any chance this is repairable?

Cosmatics951

Reviving this thread from the dead, does anybody have any information on how this is accomplished? I know there are 3 wires, brown ground, +12v constant green when switch is applied, then the green/black has voltage that allows it to return back to home?

My switch doesn't seem to be working since the green has constant 12volts.

dave1192

There is a parking circuit shown in the electrical schematics. The green wire (connected to 53a) is always hot and provides power to the motor through the internal position switch to keep the motor going after the hand switch is turned off until the parking position opens the internal switch (just like the front wipers).

Cosmatics951

Thanks Dave, I'm proud to report I have a properly functioning rear wiper. I have the factory manuals and looked at all the diagrams, I think my main confusion was what voltage the green wire was supposed to be, I think I initially was confused and thought that the green wire was the switched source not the green/black, whoopsie!

I didn't want to hook up a 12v. green if it wasnt supposed to be hot and toast the motor, but you were right, thanks so much.

To conclude, when car is off, brown is ground, green is zero, green/black is zero.

When car is on, brown is ground, green is 12v, green/black is zero.

When switch is applied, brown is ground, green is 12v, green/black is 12v.

Thanks again.