Front Windscreen Wiper Control Module

Faults and Technical chat for the Vauxhall Astra K
ajh
Posts: 25
Joined: Fri Apr 20, 2018 9:13 am

Front Windscreen Wiper Control Module

Post by ajh » Sat Apr 11, 2020 9:33 pm

According to my main dealer, my front windscreen wiper control module needs replacing to fix the wiper fault. Trouble is it’s very expensive. Does anyone know where this control module is and how to replace it.
Thanks,

Valer
Posts: 69
Joined: Thu Feb 28, 2019 4:42 pm
Astra Model: 2019 1.0 Turbo SRi Nav Hatch
Astra Options: Loads,and i don't know how to work most of them !
Astra Colour: Black Metallic GB9

Re: Front Windscreen Wiper Control Module

Post by Valer » Sun Apr 12, 2020 9:07 am

There's some confusion here i suspect,the wipers don't have a separate control module,they are controlled by the switch via the body control module.
If it is the bcm that needs changing then it's a dealer or specialist job as it will need SPS programming to the car,
it's located behind the glove box on RHD cars so easy enough to access but that won't help if you don't have the equipment to do the programming.
The complete wiper motor assembly is also referred to as a module by Vauxhall so i guess it could be that,further clarification from the dealer is needed.

Redman
Posts: 1145
Joined: Sat Aug 20, 2016 7:16 pm
Astra Model: Astra elite nav 150
Astra Colour: red

Re: Front Windscreen Wiper Control Module

Post by Redman » Sun Apr 12, 2020 9:57 am

ajh wrote:
Sat Apr 11, 2020 9:33 pm
According to my main dealer, my front windscreen wiper control module needs replacing to fix the wiper fault. Trouble is it’s very expensive. Does anyone know where this control module is and how to replace it.
Thanks,
Hi
What are your windscreen wipers actually doing ?

Quite a few used windscreen wiper motor and linkage assemblies for sale on eBay, if that is the problem.

https://www.ebay.co.uk/i/183871810771?c ... gJ-GPD_BwE

I haven't heard of many windscreen wiper motor faults on the k to be honest, in fact you are the first one. So the chances are the second hand units should be good and should come with a 14 day or so returns policy.

ajh
Posts: 25
Joined: Fri Apr 20, 2018 9:13 am

Re: Front Windscreen Wiper Control Module

Post by ajh » Sun Apr 12, 2020 3:51 pm

Hi, so this is what happened. Back in January on the way to work early I operated the screen washer and this worked but the wipers didn't move. At the same time the display lit up incredibly brightly (it was on night mode). I then tried to put the wipers on the different settings - nothing! Turned off the ignition and on again. Wipers then worked at all speeds but wouldn't turn off rain sense wasn't working. Also when I put the display into night mode the dimming didn't work either so auto display was permanently bright. Dealer at first said it was the wiper control module which they replaced, made no difference. They then replaced the Body Control Module and this fixed everything - cost £800 including fitting, however, Vauxhall paid 80% cost even though the car was 2 months out of warranty. Then recently I operated the screen wash and guess what nothing happened wipers behaving just like before but everything else works e.g display so they are suspecting the wiper control module but now the garage is shut for the duration.. Going on this advice I've bought the correct wiper motor assembly which has a control module attached for £25 off e-bay, however, I've no idea how to fit it but for £25 it seemed worth a try hence the original question.

Redman
Posts: 1145
Joined: Sat Aug 20, 2016 7:16 pm
Astra Model: Astra elite nav 150
Astra Colour: red

Re: Front Windscreen Wiper Control Module

Post by Redman » Sun Apr 12, 2020 5:15 pm

The chances of you having two wiper modules going faulty is highly unlikely if you ask me. Your original one and the replacement one from Vauxhall !
There have been several threads on here about damaged body control modules due to water ingress. They have been mainly down to the rear washer fluid pipe leaking directly on to the bcm.
The car display etc then did all sorts of things it shouldn't.

ajh
Posts: 25
Joined: Fri Apr 20, 2018 9:13 am

Re: Front Windscreen Wiper Control Module

Post by ajh » Sun Apr 12, 2020 6:53 pm

Hi Mr Redman,

You’re absolutely right! Just been out to the car and operated the rear screen wash and could see water dripping onto the carpet and the bcm!! What an idiotic design! Question is what to do now, take it back to the dealer for them to investigate and replace the bcm and not let on what you guys seem to know but not Vauxhall?

Thanks

Redman
Posts: 1145
Joined: Sat Aug 20, 2016 7:16 pm
Astra Model: Astra elite nav 150
Astra Colour: red

Re: Front Windscreen Wiper Control Module

Post by Redman » Sun Apr 12, 2020 8:50 pm

They replaced the damage last time at vauxhall without solving the cause aswell. Take them up on it, they must have chose to ignore the evident water damage that would have been visible on the bcm and the plugs, imo.
The tubing will also need repairing and make them aware this is a known early design flaw. Make sure you always have 50/50% screen wash to stop it freezing in the pipe.
If Vauxhall take it on make sure you have the correct screen wash % in the reservoir, as they have been known to test the concentration in order to turn it back on you, as the owners manual recommends it.

Good luck and let us know the outcome.

Redman
Posts: 1145
Joined: Sat Aug 20, 2016 7:16 pm
Astra Model: Astra elite nav 150
Astra Colour: red

Re: Front Windscreen Wiper Control Module

Post by Redman » Mon Apr 13, 2020 10:25 am

Here is one of the threads, so show it to the dealer if they have a problem believing you that it is common.

viewtopic.php?t=5376

ajh
Posts: 25
Joined: Fri Apr 20, 2018 9:13 am

Re: Front Windscreen Wiper Control Module

Post by ajh » Mon Apr 13, 2020 11:01 am

Thanks for all your help. Really don’t understand why
they didn’t know about this if it’s so widely discussed, also the bcm
must have had some evidence of staining as the water is so hard around here.
Anyway, I’ll let you know the outcome but I’ve no idea when the garage
will open for business again.

Redman
Posts: 1145
Joined: Sat Aug 20, 2016 7:16 pm
Astra Model: Astra elite nav 150
Astra Colour: red

Re: Front Windscreen Wiper Control Module

Post by Redman » Mon Apr 13, 2020 11:28 am

Only advice I can offer is don't use the rear wash wipe until pipe is repaired/replaced. Once the bcm has dried out it may all start working again as it should. Perhaps get access to the bcm by removing the glovebox and applying some gentle heat to the bcm and it's connectors with a hair drier.

I can only think this can happen in freezing weather, as in the rear nozzle hole freezes up and blocks, then the rear washer system having a non return valve locks in the fluid. This pressure somehow then bursts the tube or blows a joint. It would be of interest when you get to the bottom of the leak to inform us of what it was (burst pipe or piping has come off a spigot ).

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