Hello I just bought a Superb 2012 and the rear wiper doesn't work.

I have power to the connector and tried installing a new motor, but it still doesn't work

any ideas?

 

May be worth checking the boot latch is closing fully, i think there is a small connector switch in there that can affect the wiper.

No warning in the dashboard about the boot not closing but still tried på put a new match in, still no rear wiper is working

Power is coming to the connector. Tried putting 12v on the motor and it worked. Put everything back and the wiper worked one time, restarted the car and the motor made a sound like its trying to wipe but nothing happened. Now its completely silent. Any ideas?

It sounds like a broken wire or bad connection. You have proved out the motor and switch

You will have to dig quite a bit to check end to end - Get yourself a diagram and work through it bit by bit and try and isolate the cause - Choose a centre point in the diagram and see if the problem is before or after

Slow work and will wreck your head but if you are methodical and test one part at a time you will get to the issue !

There is power to the connector that is going in the motor. Both 12v and 12v when lever is used.

So I think that it could be a grounding issue.

Gonna try and make extra ground wore somehow to see if it's the issue

Made an extra ground and it still doesn't work. Starting to lose my mind.

Once again I have tried to fix it but without any luck. Now when I it all back togheter it made a sound when I turned on the ignition like it was stuck. Then when I turned on the car it made 3 "waves" and stopped a little bit further down. This happend once again when I restarted the car. Any one got some ideas what could be wrong now?

this looks like a thermal security issue here, when the wiper motor axle stops after 3 turns it experiences too much resistance an will prevent the motor damaging itself. it maybe wise to lubricate the axle?

I thought of something like that but it seems wierd that it does it as soon as I start the car. I dont have the lever "toggled" on for thr rear wiper

7 minutes ago, hermanlol123 said:

I thought of something like that but it seems wierd that it does it as soon as I start the car. I dont have the lever "toggled" on for thr rear wiper

I think they do a wipe on starting the car if you last reversed when parking up

6 minutes ago, a666andy said:

I think they do a wipe on starting the car if you last reversed when parking up

Sounds like that could be a think. Reversed parked now so can see tomorrow if that happened.

I've tried lubricated the motor now but It's still making this noise with ignition on and when starting the motor it makes 3 turns. I've added a audio file of the sound it makes. I also did measure the contact once again and now I can get power from 2 of the 4 pins. One is earth/neutral so assuming. I get constant 12 volt from 1 pin and 12 volt when the washer fluid is being pushed. Is the last pin supposed to get 12 volt when I turn on the wiper? I'm feeling a bit lost as its moves when starting the car but gets no power when the lever is being pushed.

Usually there are two lives to a wiper motor, permanent live and switched live. I'd guess you have a broken wire where loom passes from the boot lid to the body inside the flexible conduit.

I am presuming this is an estate as it has a wiper but twin door is notorious for broken wires (obviously no wiper) . Basically wire quality isn't great.

Edited 16 November, 202516 Nov by bigjohn

Did you manage to figure this out? I'm having problems with my rear wiper and seems like it could be a similar problem.

20 hours ago, jimbocos said:

Did you manage to figure this out? I'm having problems with my rear wiper and seems like it could be a similar problem.

Yes. Tried measuring the power again and saw that it was lower than 12v but not 0 so opened the wiring harness between the body and bootlid and saw that a cable was bent not completely off. My wiper motor was also dead so had to change the motor and repair the cable