chobi

Hi, my rear wiper started to act funny in the winter, it would activate after 5-10 sec, in spring it would take 2-3 minutes to wipe once. Finally it stops last month completely. I took it a part, order new motor, replace and still won't work.
I mesured the voltage on the connector and it gives 12 v on 3 pins but it gives even when is not activated on 3 of 4 pins. How to test motor itself? Sprey nozzle works ok. I am thinking is there any relay or something that could go bad?
I read here that in Q7 forum that guy had a problem and mechanic found some hidden box behind passanger compartment??
Any Idea would be appreciated, thanks.

https://www.audiworld.com/forums/q7-...oblem-2945693/

Turns out there's an undocumented fuse box behind the glove compartment that I could not find any internet Audi or other documentation about. in the years previous to the 2013 it was well documented but there after about 2010 I could not find anything that would show this

rdA4WtQ5

Did you perform a VCDS scan? My rear wiper woes turned out to be the multi-function switch and the scan ratted it out.

chobi

I will scan and check if any code is there but switch cost 500$ it is expensive repair.

rdA4WtQ5

Ya it is. I bought the OEM switch online for about $300 at the time. Mine got worse and all the wiper controls got variably wacky so I had to fix it.
When only the rear wiper was intermittently working I could live with that.
Have to remove the steering wheel, not for everyone to fix with the airbag. The scan should better aim you in the correct direction.

chobi

I did scan and only thing that shows related to my problem is this:
00908 - Control Module for Wiper Motor
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 3
Fault Frequency: 1
Reset counter: 42
Date: 2019.06.16
Time: 15:09:00
but this was Saturday when I disconnected harness from wiper motor and tested for voltage. No error code in last 3-4 months when problem started.
Do you remember your code and how to remove switch from steering wheel?

rdA4WtQ5

The code description was something like multifunction switch malfunction and number of instances. I would clear the code and it would be fine for a while. At the end it wouldn’t stay cleared.
Once the air bag and steering wheel is removed then removing the switch assembly includes all stalks is a breeze.
Looks like the module connector or module in yours and not the switch.

Gtrekker

Easy fix. Pick up a rear wiper delete kit. No wiper to hold snow n you have mirrors to see where you have been, plus a backup camera.

chobi

If I can't figure out how to fix it., that would be an option.