Hi everyone!

After washing my car and fitting airbag connector tighter (airbag warning signal appeared) my low beam headlights stopped working. High beams and fog lights work. ECU doesn´t signal any lamp error. Fuse is fine. What could be problem? It was really wet outside and I washed my car, and my ecu has custom placement so it´s right next to battery. Could it be moisture? I have kept my car indoors for about 2 hours but it didn`t help. Are there any experts familiar with this situation?

Possibly water in the engine compartment fuse box. There' a guide to drying/cleaning it here: https://www.fiatforum.com/stilo-guides/313986-how-clean-dry-out-fuse-box-near-battery.html
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Greetings!

The same thing happened to me after raining a lot.
The two h7 bulbs (low beam) died and I had to replace them.
No ECU error and the fuse was fine.

Cheers

When I bought my stilo, I had a burned out low beam bulb, and no bulb error. So I'm not sure headlamps always throw a bulb error, depending on what's happened to them.

AdrianInFlorida said:

When I bought my stilo, I had a burned out low beam bulb, and no bulb error. So I'm not sure headlamps always throw a bulb error, depending on what's happened to them.

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Main and dipped headlamp bulbs do not give a bulb failure warning. It's assumed that the driver would notice a failed headlamp bulb by the light pattern on the road.
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Problem solved!

It was burned bulb. I trusted too much on computer to signal lamp error, should have learned something from Terminator! It´s stupid though that you have all these bulb failure indicators but no low beams. Well I´m grateful it´s fixed, thanks to everyone who replied!

Tuoze said:

Problem solved!

It was burned bulb. I trusted too much on computer to signal lamp error, should have learned something from Terminator! It´s stupid though that you have all these bulb failure indicators but no low beams. Well I´m grateful it´s fixed, thanks to everyone who replied!

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Bulbs failure is to tell you about build you don't normally see or know about, such as indicators, and brake lights etc. You should be able to see if a dipped or main beam bulb has blown by the lack of light on the road

I have a good headlight story.
I was in my Lancia (last car) and on starting off on a dark road had a bulb blow (right hand side). Only 5km from home so kept going. Of course met a police car going the other way in town and he pulled me over.
He says "Do you realise you have a light out?" as he gets out his fine book. I say " Do you realise you have the same light out on your car?"
He looks, gulps and says "I might just let you off this time then"