Audi A3 rear wiper has gone crazy.

[vrod]

My wifes 2005 Audi A3 sportback has developed a rear wiper problem. Its gone crazy!

When you turn the ignition on, it usually starts the rear wiper, even when the switch is not touched. It will normally stop after about 5 wipes, but not in the parked position.
Will then randomly operate when driven, sometimes it returns to the park position and other times it won't.

Seems to be an electrical problem, read on some serches that water can get from the washer jet into the rear motor causing an electrical short. Some other notes talk about the 'convienience module' in the passenger footwell getting wet.

Anyone else had this problem?

[Tame Technician]

Its the rear screen wash water in the motor on A3's. The motor electrics get hit first, Before long the dash will say boot open and the alarm will keep going off, as water gets intot he boot open switch connector.

To check if this is the problem. Try the rear washer for a good long blast then open the boot, expect to see alot of water coming out of the interior boot trim.

Or if your upto it, remove the interior boot trim and check the motor visually.


Needs a new rear wiper motor.

[vrod]

Thanks for the info Tech. I'll get the tailgate trim off at the weekend.