[triffic]

Wise choice to get someone with professional gear to replace the relay - removing them can be a bit of a pain, if you want to be sure not to damage the board.

Good to hear it solved the problem.

 

[mr nozzle]

8 days later and quite a few hundred miles in all sorts of rain and I'm declaring the issue fixed.

 

[CAT3]

8 days later and quite a few hundred miles in all sorts of rain and I'm declaring the issue fixed.

Don't suppose you managed to get a picture of the offending relay did you, where it's positioned on the PCB for example ?

 

[mr nozzle]

Hi, I didn't take any snaps of the relay but it is covered here

J519 Relay description

HI all, I know this has been discussed in great depth for varies fault around the van... I've been reading in depth about Wiper issues (mine are being a pain - Replaced stalk as part of cruise control retrofit, replaced motor and still have issues with wipers stopping - usually after we've been...

www.vwt4forum.co.uk

 

[dc98]

I have ordered a new relay for the BCM, relay i.d. is V23084-C2001-A303. I plan to get someone who is better than me with a soldering iron to replace it for me. I'll update here when done.

I seem to having the same issue and I'm thinking of replacing the relay myself. Just wondered if the part number you used (A303) is the same or a replacement for the one ending A403.

I cant seem to find anyone selling the 403 part number in the UK

 

[mr nozzle]

I used this guy mate 2 x Car Relay BMW E46 M3 E83 X3 & Audi A2 A3 A4 V23084 C2001 A303 & VW T5 Wipers | eBay

 

[dc98]

I used this guy mate 2 x Car Relay BMW E46 M3 E83 X3 & Audi A2 A3 A4 V23084 C2001 A303 & VW T5 Wipers | eBay

nice one cheers, I’ll double check the bonnet switch first and then probably order those later.

 

[eirej]

OK, it's done. I need to see how it goes when driving in the rain but I've done a 10 minute test on the drive and it seems the problem is fixed. After reading through the hundreds of posts here and elsewhere, I took a punt on the problem being the relay on the BCM board. I purchased the v23084 c2001 a303 relay on ebay for £8.99 (got 2 so if anyone wants the other 1, pm me, it's yours).
I removed the BCM from under the dash, I used this as a guide How To Check What VW T5 BCM Is Installed - Advanced In-Car Technologies mine was slightly different in the way that my BCM was in a rack horizontally. The torx screw on the far left was only accessable after removing the lower trim around the gear stick. I took pictures of the plugs in the BCM before removing to make it easier to put back together.
I found a place near me that manufactures printed circuit boards and contacted them to see if they would replace the relay on the board. They said yes so I jumped on the old unfaithful scoot and went for a ride. I didn't fancy soldering it myself, I'm ok at soldering wires (I've had VWs for years ) but didn't want to stuff this up. The next day it was ready for collection, £20 cash. BCM back in and cleared the codes. 10 minute test on intermediate, normal and fast.
I'll update once tested fully.

mr nozzle, I am taking the very same approach as you. Can I ask, did you do the coding bit yourself? Like, did you buy the cable and the software and is it hard to clear the codes? I bought both a used BCM which just has a different letter after the number on it, and I bought one of the relays. I will fix my old one, try plug in the new one and see if it works without coding, but will have to copy and paste the coding from the old one on to the new one if there are issues. Just thinking if its cheap and easy enough I could do that myself?

 

[mr nozzle]

Hi, I used a XTool V401 code reader to read and clear the codes. £50 on Amazon (other retailers are out there). I took the BCM out and got it repaired without putting another one in. I'm not sure if the XTool has the capability of coding a different BCM. Good luck and keep us updated

 

[SJPeppers]

Glad to have found this thread, although it's a long read it's helped me a lot to know what to look at and that I'm not the only one being driven crazy with this. Very much a safety hazard when they fail on the move. For what it's worth, VIN = WV1ZZZ7H9H0983**

 

[SJPeppers]

I seem to having the same issue and I'm thinking of replacing the relay myself. Just wondered if the part number you used (A303) is the same or a replacement for the one ending A403.

I cant seem to find anyone selling the 403 part number in the UK

Electrode material in A303 is AgNiO.15 (Silver Nickle Oxide 15%)
Electrode material in A403 is AgSnO2 (Silver Tin Oxide)

Worth noting the first part of the code relates to different coil resistances / powers for each
C2001 = Rated @ 12v. Operate 6.9VDC. Release 1.0 VDC. Coil Resistance 255 ohm. Coil Power 565mW
C2002 = Rated @ 12v. Operate 5.8VDC. Release 0.8 VDC. Coil Resistance 178 ohm. Coil Power 809mW

Data on each...

C2001 A303:

https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Data+Sheet%7FV23084-X0000-A001%7F0214%7Fpdf%7FEnglish%7FENG_DS_V23084-X0000-A001_0214_084_0214.pdf%7F1393267-2

C2002 A303 (seems to be same as 2001 above):

https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Data+Sheet%7FV23084-X0000-A001%7F0214%7Fpdf%7FEnglish%7FENG_DS_V23084-X0000-A001_0214_084_0214.pdf%7F1-1393267-0

C2001 A403:

1393267-6 TE Connectivity - Relays - Distributors, Price Comparison, and Datasheets | Octopart component search

Find the best pricing for TE Connectivity 1393267-6 by comparing bulk discounts from distributors. Octopart is the world's source for 1393267-6 availability, pricing, and technical specs and other electronic parts.

octopart.com

C2002 A403:

1-1393267-2 TE Connectivity - Relays - Distributors, Price Comparison, and Datasheets | Octopart component search

Find the best pricing for TE Connectivity 1-1393267-2 by comparing bulk discounts from 3 distributors. Octopart is the world's source for 1-1393267-2 availability, pricing, and technical specs and other electronic parts.

octopart.com

Image source is this ebay post V23084-C2002-A303 TYCO Relay BRAND NEW Relais [QTY=1pcs] | eBay

 

[mr nozzle]

I wonder what the predicted lifespan of these relays is worked out as. My van is 12 / 13 years old and the relay had failed. Due to this being a well documented safety risk I would have thought VW would recall and replace.

 

[SJPeppers]

I would expect relays like this to be comsumable items. Seems daft to solder such a vital relay to a circuit board.

I've been lucky enough to pick up a second hand BCM which had the same coding. Same wiper issue though, so either the relay in that is duff too or it's something else.

Managed to de-solder the old relay in mine and solder the new relay in, it's in the van now and it all works fine for now, so time will tell. Unless you have practice soldering, it's not easy.

Pulled the old relay apart, you can see that the set of contacts on the left, (which should be closed in the normal position) are clearly burnt out - and have major pitting and build up on the normally open side. Whereas the contacts on the right have minimal wear.

 

[Jackson2094]

Hi everyone, just thought i'd say thanks for all the posts and advice, had the dreaded wiper issue and have today fitted the new relay and so far so good, will keep you updated as time goes on. Thanks again. also attached a photo of the relay which is burnt out the same side as above.

 

[Ricky m]

OK, it's done. I need to see how it goes when driving in the rain but I've done a 10 minute test on the drive and it seems the problem is fixed. After reading through the hundreds of posts here and elsewhere, I took a punt on the problem being the relay on the BCM board. I purchased the v23084 c2001 a303 relay on ebay for £8.99 (got 2 so if anyone wants the other 1, pm me, it's yours).
I removed the BCM from under the dash, I used this as a guide How To Check What VW T5 BCM Is Installed - Advanced In-Car Technologies mine was slightly different in the way that my BCM was in a rack horizontally. The torx screw on the far left was only accessable after removing the lower trim around the gear stick. I took pictures of the plugs in the BCM before removing to make it easier to put back together.
I found a place near me that manufactures printed circuit boards and contacted them to see if they would replace the relay on the board. They said yes so I jumped on the old unfaithful scoot and went for a ride. I didn't fancy soldering it myself, I'm ok at soldering wires (I've had VWs for years ) but didn't want to stuff this up. The next day it was ready for collection, £20 cash. BCM back in and cleared the codes. 10 minute test on intermediate, normal and fast.
I'll update once tested fully.

Hiya mate, catching up on this massive thread on what appears a hugely common fault. great explanation by you can I confirm which relay number it was on the bcm for the wipers? 3? Mines a 2009 t5 if it differs year to year.

 

[SJPeppers]

2009 T5 owner here. The wiper relay soldered to the BCM / ECU (part no. 7HO 937 049 AB) here is a v23084 C2001 A403. Circled red in photo below. If you can get the ECU out, it's fairly easy to pop the case open to identify the wiper relay.

 

[mr nozzle]

Hiya mate, catching up on this massive thread on what appears a hugely common fault. great explanation by you can I confirm which relay number it was on the bcm for the wipers? 3? Mines a 2009 t5 if it differs year to year.

Hi mate, apologies for the late reply. The picture shows the location of the relay and this is what I showed to the people in the factory.

 

[Deano7!]

We can now offer a repair on the BCM. Cost is high though at around £200 inc return carriage.

7 years too late i would imagine but does anyone repair these ? my wipers are shxt like everyone else's !!

 

[Deano7!]

7 years too late i would imagine but does anyone repair these ? my wipers are shxt like everyone else's !!

I say repair because although i can take the control unit out i am useless at soldering ad so wouldnt be able to repair it myself i dont think. Look forward to any replies

 

[Deano7!]

Does anyone know where I can get a new relay from ? Or a repair to my existing one ?