rear wiper failure

[Fast4esT]

is it common for the rear wiper to sort working on these cars? I do not use mine often but just noticed it has stopped working recently no matter what settings I try. Not sure where to look first but hoping its the the wiper switch lol. the still pump works

[mys4.org]

I would check all the fuses. I believe the rear wipe is on its own.

[Norskie]

It's a long shot ... but maybe there's a break in the wiring harness to the hatch? I've seen this on other brands.

[Fast4esT]

I’m gonna check the wiring there, gonna check if power is getting to the motor. I will check the fuses and I have read a tsb that there is a split ce in the wire under the trim below the drivers door. Not sure why that is there but apparently it can get corrosion.

[Fast4esT]

did not have much time to fiddle today but its not the fuse, at least as long as I checked the right fuse. number 14 in the drivers side of the dash.

[Fast4esT]

connected VCDS, the rear wiper shows up as inactive
when I push the switch forward it says active
when I push the sprayer on:
sprayer says active
wiper says inactive

Im assuming this is correct operation

following this TSB
https://testing-public.carmd.com/Tsb...107425/A921511

with wiper switch pushed forward to activate rear wiper I read the following values

I get 11.32 volts between pins 1 and 4
I get 6.5 volts between pins 4 and 3
I get 11.32 volts between pins 4 and 2

voltage difference was more than 0.5 volts between pins 4/3 and 4/2

according to TSB I may have a broken wire?

then I noticed that the wiper had wiped he glass, it started working momentarily. then stopped again

I then jumped pins 1 and 2 and the motor works.

so I narrowed out the motor being bad and believe the switch also to be ok.

for fact that the wiper worked for a moment I thought the break in the wire must be in the rear hatch opening. I pulled the trim and undid the harness black sticky cloth and saw no broken wires, I went as far as I could see into the roof following the harness, nothing broken. I did not proceed into the wiring going down the side of the hatch, cannot imagine wire breaking down there, it all stays pretty still.

I did not check the harness as the TSB states to do in the driver door opening, guess that will be my next inspection.

I just don't get why it started working for a minute

[Fast4esT]

still have not solved my rear wiper not working:/

[Fast4esT]

one year later the rear wiper started working again

[Fast4esT]

got excited too soon, it worked for a week and stopped working again. I don't get it??

[Norskie]

Check the wireloom to the rear hatch, specifically in the area where it goes from the body to the door and flexes every time the hatch opens and closes.

[Fast4esT]

I checked the harness all the way to the pump and as far as I could rear into the headliner