I have a '98 A6 Avant and I've had a problem with my rear wash wipe for some time, where the wiper would stutter across the rear screen, stopping and starting whenever it wanted.
On top of that, some time ago the washer stopped working. You can hear the pump running but nothing gets to the screen.
Last week it decided that it wasn't going to turn off and just stuttered across the screen regardless of where the wiper stalk was positioned, until we stopped the car and turned off the ignition off.
Yesterday I fitted a new wiper motor and yippee, no more stuttering, just perfect clean sweeps
The bad news is, still no water
I had assumed that the old one had become blocked as part of it's general failure due to age, but the unit I've fitted is brand new, so surely it can't be due to blockage. If I disconnect the pipe and operate the stalk, water is flowing through the pipe, but when I connect it again - nothing.
You can see the pipe moving from the pressure, but does the pressure need to be a certain amount before forcing it's way through the new unit.
Will a new washer pump solve the problem.
Any help very much appreciated.