Hi all first time posting as have been left baffled by my problem,

Front wipers do not work but rear wiper stuck on even though stalk is in the off position, diagnostics shows no error codes, have checked all fuses (all are fine) changed the steering column switch but still have the same issue, can turn the front wipers on through the diagnostics machine so assuming not motor related, wondering if anyone could help as have no ideas left as have tried what all have suggested on forums, thanks

8 hours ago, Luke_w said:

Hi all first time posting as have been left baffled by my problem,

Front wipers do not work but rear wiper stuck on even though stalk is in the off position, diagnostics shows no error codes, have checked all fuses (all are fine) changed the steering column switch but still have the same issue, can turn the front wipers on through the diagnostics machine so assuming not motor related, wondering if anyone could help as have no ideas left as have tried what all have suggested on forums, thanks

 

Front wipers seem to be mainly controlled directly from the BCM. it has no direct connection to the stalk from what I can see inside the wiring diagram.

 

This would explain why you can still trigger it through diagnostics and why no errors are showing, it seems like there is still an issue with the stalk or the wiring somewhere along the line back to the BCM.

 

 

The stalk seems to have one point of ground which is indicated by T10a/2, this feeds back to a bunch of ground points but your problem could lie in that T10a connector.

 

It is possible it is instead grounding through the reverse motor as that has its own, I doubt that would cause this issue. Check all the connectors again as it is possible the BCM is only running on the last know settings.

 

Can you use the sprayers on front or rear?

Edited 27 March, 20215 yr by stevob21

Thanks Stevo will take a look at this, do you think it could be a faulty bcm, if i can get a replacement depending on price 😅 this would sort the problem ? Or if the problem lies within the wiring itself

32 minutes ago, Luke_w said:

Thanks Stevo will take a look at this, do you think it could be a faulty bcm, if i can get a replacement depending on price 😅 this would sort the problem ? Or if the problem lies within the wiring itself

 

I'd definitely do some diagnostics first, swapping out the BCM often isn't the easiest thing to do and can require recoding it exactly the same as your old one.

 

I'll pull the wiring diagram up and try figure out what the pins do as you may be able to do some checks with a multimeter.

Ok, it looks like if you provide 12v on Pin 3 and a ground on Pin 2 that it should give signals out depending on how you have the switch set.

 

Pin 2 = Ground

Pin 3 = 12v

Pin 4 = Input of intermittent wiper switch -E22- (1st stage)

Pin 5 = Input of intermittent wiper control -E38- (I think this is the adjustable stage due to the potentiometer or variable resistor symbol)

Pin 6 = Input of intermittent wiper switch -E22- (2nd stage)

Pin 7 = Input of rear wiper switch -E34-

 

From this, it seems like you should be able to diagnose via a multimeter - it doesn't seem like this "module" uses LIN or CAN to communicate but instead individual wires.

Edited 27 March, 20215 yr by stevob21

Thanks Stevo much appreciated, will take a look into this 

Hi,

My daughter's Fabia had similar problem but the front wipers wouldn't turn off.   This was caused by copper filings shorting between contacts in the wiper switch.   I found a good guide to dis-assemble switch and clean.  Now all works fine.

Look at my post at the end of last year.

I hope this helps you.

Regards

Video guide on someone fixing this issue. 
 

https://youtu.be/w4CWH5p5VWM

Edited 18 April, 20215 yr by JGrindel

Sorry been busy lately and forgot to post with an update, tried all things and nothing worked so tried a new official stalk, which still didnt work, left at a garage which they managed to get the fronts to work but rear motor has to be disconnected otherwise blows fuse to front wipers, still left baffled by what is causing this problem, will try a different rear motor next to see what that does and update after.

Also forgot to add that now when i turn my rear heated screen on the front wipers turn on, so even more baffling but dont know if this could be rear motor related or still the more dreaded BCM

14 hours ago, Luke_w said:

Also forgot to add that now when i turn my rear heated screen on the front wipers turn on, so even more baffling but dont know if this could be rear motor related or still the more dreaded BCM

This is definitely sounding more and more like a bad earth, you will need a detailed wiring diagram and a few days to diagnose or allow a garage to do this for you.

 

If you have a code scanner, there might be stored errors giving you a rough indication of what is happening.