Audi A4 Avant rear wiper ?

The first thing to do is to see if any current is reaching it. Is the wash on the same fuse as the wiper? If not, maybe the fuse has gone. If the fuse is OK, expose the terminals on the wiper motor and see if there is any current there when switched on (how? by using a multimeter or a bulb with wires soldered to it). If there is current, then the motor may be faulty. Does the wiper only come on for only a few wipes at a time when working properly, or is it supposed to stay on all the time the switch is on?

Rob Graham

Not sure about this particular car, but most rear wipers on a 'decent' car are intermittent operation only. If so, I'd guess at the intermittent unit. Motors rarely burn out in this application.

The first thing to do is to see if any current is reaching it. Is the wash on the same fuse as the wiper? If not, maybe the fuse has gone. If the fuse is OK, expose the terminals on the wiper motor and see if there is any current there when switched on (how? by using a multimeter or a bulb with wires soldered to it). If there is current, then the motor may be faulty. Does the wiper only come on for only a few wipes at a time when working properly, or is it supposed to stay on all the time the switch is on?

Rob Graham

my friend use to have the a4 avant with the same problem, tried all of the above, replaced the motor and still nothing, had it diagnosed at audi and they couldnt find the root of the problem, they tried another motor but still nothing, finally swap the motor with a working one off a demo car it worked! would you believe that after trying 3 brand new out of the boxes motors they were all duff!

Unless switched on with the blade frozen to the screen!

I've seen this a number of times, the motor turns just enough to activate the park switch, so voltage is reaching the motor all the time even after it is switched off.

Chris