MK5 Golf GTI

All Things Mk5 => How to Guides / Troubleshooting => Topic started by: GTIEagles on August 25, 2015, 12:59:15 pm

Title: Intermittent rear wiper fault
Post by: GTIEagles on August 25, 2015, 12:59:15 pm
My car had it's MOT last Friday and passed with no advisorys  :happy2: but over the last couple of days the rear wiper has refused to work. I can hear the relay click when activated but no movement. Although it worked again briefly yesterday but stopped working when I used the car later that day...

Any ideas?
Title: Re: Intermittent rear wiper fault
Post by: perksy on August 31, 2015, 12:24:56 pm
I've got the same problem in reverse. 

Sometimes when I start the car the rear wiper starts and won't stop until I start the car and restart again.

Any ideas?

Thanks
James
Title: Re: Intermittent rear wiper fault
Post by: hlcst on August 31, 2015, 01:30:47 pm
Have you checked the fuse bud? I removed my fuse when I decided to de wiper and it still clicks when I put it in reverse
Title: Re: Intermittent rear wiper fault
Post by: white91 on August 31, 2015, 07:58:03 pm
I've got the same problem in reverse. 

Sometimes when I start the car the rear wiper starts and won't stop until I start the car and restart again.

Any ideas?

Thanks
James

I get this too
Title: Re: Intermittent rear wiper fault
Post by: PM30S on August 31, 2015, 08:50:05 pm
My edition 30 had the rear wiper removed when purchased.
I cannot get the rear wiper to work on its own.
The only way it will work is if I spray the front screen with washer fluid, then it wipes the rear screen 4 or 5 times.
Very strange.
Title: Re: Intermittent rear wiper fault
Post by: GTIEagles on September 01, 2015, 08:11:53 pm
Well since the weekend, mine seems to be working again, very strange I guess it's probably a loose connection somewhere?


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Title: Re: Intermittent rear wiper fault
Post by: Ricky123 on September 03, 2015, 01:06:30 am
Audi a3's of similar year to mk5's suffer from water off the rear washer leaking into motor and cause them to act like there possessed lol

Could be that?
Title: Re: Intermittent rear wiper fault
Post by: missymckay on September 03, 2015, 10:20:17 am
I had a similar issue with mine. It turned out to be issues with the wiring loom in the bit that goes from the car to the tailgate. I had to have the wires put back together as they were falling apart. Since the repair, it works fine :)
Title: Re: Intermittent rear wiper fault
Post by: GTIEagles on September 03, 2015, 10:45:57 am
Audi a3's of similar year to mk5's suffer from water off the rear washer leaking into motor and cause them to act like there possessed lol

Could be that?

Do you know of a fix?
Title: Re: Intermittent rear wiper fault
Post by: GTIEagles on September 03, 2015, 10:47:00 am
I had a similar issue with mine. It turned out to be issues with the wiring loom in the bit that goes from the car to the tailgate. I had to have the wires put back together as they were falling apart. Since the repair, it works fine :)

Thanks I will check it out, I will also put it on VCDS and see if any errors come up.
Title: Re: Intermittent rear wiper fault
Post by: Ricky123 on September 03, 2015, 04:06:31 pm
Audi a3's of similar year to mk5's suffer from water off the rear washer leaking into motor and cause them to act like there possessed lol

Could be that?

Do you know of a fix?

Replacing the wiper motor was the cure when I had mine as the motor and washer pump are a combined unit
Title: Re: Intermittent rear wiper fault
Post by: GTIEagles on October 06, 2015, 10:38:35 am
Update to this post:

I have found that by squeezing the wiring that goes from the roof of the car to the boot, I can get the wiper working again. So I guess that means there must be a fault with the wiring somewhere? Is there any easy way to check?
Title: Re: Intermittent rear wiper fault
Post by: GTIEagles on October 06, 2015, 11:11:56 am
Done some digging around and found this very helpful guide: http://www.mk5golfgti.co.uk/forum/index.php?topic=86689.0

I'm hoping mine is not as serious but at least I know there is a solution!
Title: Re: Intermittent rear wiper fault
Post by: SiofChester on October 07, 2015, 01:33:40 pm
I went through a bunch of debuigging on this, wiring checks etc etc Turns out it was the motor. BOSCH motor off the bay of e and its been reliable for 6 months now
Title: Re: Intermittent rear wiper fault
Post by: GTIEagles on October 07, 2015, 03:06:56 pm
It definately is the loom, I checked it last night and found this: (https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fphil_eagles%2FCar%2Floom.jpg&hash=972fcdb39aff2ec0f9ce2720ed3f3c9e83f5fd72)

It's probably the reason why the high level brake light is dead too!
Title: Re: Intermittent rear wiper fault
Post by: Tomble22 on October 25, 2015, 10:04:54 am
How are you dealing with these broken wires? My rear wiper stopped working this week, had a check of the wiring yesterday and mine is like yours, split and broken wires everywhere.

I'm just going to try and connect them all up with some crimp connectors or a block connector but have seen some replace the whole wiring loom, is this necessary? Also ripped the bloody grommet thing so going to have to replace this as well!
Title: Re: Intermittent rear wiper fault
Post by: dale.edwards on October 25, 2015, 08:25:36 pm
I've had this very same problem recently with the wiring. I first tried to repair the wires with crimp butt connectors but in truth they're very bulky and the wires are in a small space so caused more damage than I fixed.
The wiring on mine was in poor condition and fragile. In the end I changed the wiring loom. This comes with the rubber conduit as part of it and the wiring if a much higher quality so worth it I think.
If you are going to attempt to repair then I would say best solder then heat shrink due to the space they run through...
Title: Re: Intermittent rear wiper fault
Post by: Tomble22 on October 26, 2015, 12:26:58 pm
Well, i attempted to fix the broken rear wiper/ mash of cables yesterday and am fairly happy with the result.

The rear wiper is now working again but only when you spray the front windscreen first. Some swapping of wires didn't help the problem and after a couple of hours on this yesterday I gave up trying but i will have another go at the weekend.

Connections wise i'm happy though as they are all now neat and tidy. Taped it up until i can order a new grommet but because i've used bullet connectors on all the wires i'll be able to just pull them apart, slide them through the new grommet and connect them all back together!!

Will be interesting to see how the connections hold up under the stress of the boot opening and closing, i used bullet connectors as they should have a bit of play in them and if they do stretch, it should just be a case of pushing the connectors back together again!

(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fah201%2FTom_Blewett%2F2015-10-25_12.23.46_zpscdw78f23.jpg&hash=1f9cfa1a47645297f60ca620118dfe5c470d57ff)
Title: Re: Intermittent rear wiper fault
Post by: dale.edwards on October 26, 2015, 07:03:51 pm
With regards to it only working when u spray the windscreen have you checked the wiring with a multimeter?
I wrote this on another thread but could help you with this issue maybe:

Check the four pin connector that plugs into the motor with a multimeter.
There will be three white wires and one brown. Before testing you need to fool the car into thinking the boot is closed or it will not work. Do this by clicking the boot lock inwards twice, your dash screen will tell you if it thinks the boot is open.
The wires are numbered at the connector and you should have the following readings with the wiper switch off:
1- White wire - 12v
2 - White wire - 12v
3 - White wire - 12v
4 - Brown wire - Ground

Then when the switch is on:
1 - 12v
2 - ground
3 - ground
4 - ground

If you are not getting the correct reading on wire 1 then this will be controlled by a fuse in the board next to the steering wheel. It could also be a broken cable.

Wires 2 and 3 are controlled by the two relays. These are located under the steering wheel, accessed by pulling out the folding cubby hole. From memory they have the number 404 on them. They are on top of each other at the bottom right of the relay board.

Wire 4 is a straight forward ground cable.

If your problem is a broken cable it is highly likely to have broken under the rubber conduit as you look at the tailgate from the rear of the car on the left.

Another tip I can give you is that the same relays that control the rear motor also control the windscreen wash motor, if this is working it is not your relays that are causing the problem.