I guess you might have already tried increasing the sensitivity of the rain sensor?

 

Yes thats in the screen menu ? Im pretty sure its on Max

 

I have this issues on my 60plate giulietta everytime it rains they won't work unless I use the stalk once to activate after that they work fine, I'm starting to think it's designed that way for a reason, not sure of the reason though lol my sensitivity is on full and there on auto all the time, I think the only auto part is the speed they move, which does work very well to be fair.

Sent from my HUAWEI VNS-L31 using Tapatalk

 

Mine is the same, when reversing off the drive in the morning I have to flick the stalk and both come on once then work normally..

 

Just in case you didn't already know this, or don't have a owner handbook, every time the ignition is turned off you need to re-enable the auto wipers, by switching from Auto to Off then back to Auto. This is a design feature, so that the wipers don't come on automatically when you turn on the car with ice on the windscreen etc

 

:cop:

flipping the stalk is enough, you don't need to turn to off and auto.

 

 

Behaves the same as in the older cars - Stilo, 156, 147, 159 etc. Do you have a handbook? I remember you were asking about the recirculation/pollution sensor before so I imagine not. The wipers need to be turned off and back to AUTO to make the "acquisition stroke". You might have achieved that by using the windscreen washer on the other 10% of occasions.

Rear wiper operates when reversing IF the front wipers are active.

Time delay between wipes - or speed of continuous wiping - varies according to droplets of water measured over a tiny area near the top of the windscreen. It's like TV ratings, where out of 100 self-volunteering participants, 8 watched a TV programme... and sadly that's extrapolated to say that 450,000 Australians watched it, so advertising costs $$$$... it's all a crock of ****.

If there is a water spot on the glass over the sensor, the water will 'pool' around it and droplets will break up, blow around, etc. making the extrapolation hopelessly inaccurate. Try polishing the glass over the sensor with a silicone-free polish. Still won't help when you brake and water runs off the roof, of course, as those rivulets miss the sensing area.

-Alex

 

CS155 - what do you mean by flipping the stalk?

 

flip up, like you do for a single wipe

 

Ah yes, fair enough! for some reason I find it more satisfying to rotate the switch

-Alex

 

Thanks guys - that is very fiddly to do all that to make it "Automatic" Lol

I hope this cumbersome system improves on later models.

It is like talking to Siri on my phone. Unfortunately Siri is switched off. Looks like Ill be using manual wipers as well

Better still I should get Siri to operate the wipers ! :hehe::hehe:

 

Cumbersome?
Unless you have a heated screen , like my wife's Ford Kuga, I don't see any alternative to this system. My new 2017 Speciale has it just as my 2011 Lusso did.

 

Haha - can't see Siri operating the wipers anytime soon but theoretically possible through an OBD gateway and a special app - very specific to the body computer though, would need to be specially written for the Giulietta!

I recall that my Mercedes CLS automatically activated wipers without 'first-time enabling'. Turn the key on and if it was raining, the wipers would start. I seem to remember a great number of forum complaints about unwanted dry wipes, particularly after parking in dusty conditions. Mine would sometimes give a few dry wipes before giving up. Requiring a one-time manual wipe is probably a better idea overall.

-Alex

 

My 159 seems to have a mind of it's own on the wipers. works fine on first start then either doesn't notice the rain or goes into top speed regardless of water falling on the screen drives me mad :weeping:
Tried cleaning the sensor and the screen but makes no difference.
I don't actually think there is anything wrong just poor qaulity sensor as sometimes it will work as I think it should

 

They've driven me mad over the years, too. Have you tried polishing the glass and applying Rain-X? New wiper blades?

Sometimes the sensor loses its bonding to the glass - I think it is usually pressed against a silicone gel to achieve minimal change in refractive index such that the sensor is focussed on the outsidesurface of the glass. Have a look for an evenly-dark surface across the sensor. If there are 'cracks' or 'bubbles', get a windscreen shop to re-bond it. I had that done once and it improved matters.

-Alex

 

If the auto system was not effective, yes...Fred....

 

I have no problems with my Auto wipers, other than the rear one often wipes too often when it is raining.

The front and rear seem to be linked, so the more rain which goes on the front screen also means that the rear wipes more.


But the faster you go the less the rear actually needs to be wiped even though the front needs to be wiped more.

Oh and yes it only activates after you switch on/off or you do a flick wipe.

I have the sensitivity setting on mine in the middle, same with the auto lights (but I hardly use those)

 

I'd prefer the system used in the Alfa. Once you know you need to activate it. I wonder how many wiper arms have been turn off or damaged on Mercedes when going through a car wash...

 

A car wash?

 

:lol:

 

Have no idea what ice is like in Australia. We never get that here

 

Really? I want to go skiing in Australia sometime, when it's summer here.

 

Not in Sydney where I live :rofl: