I want to add Light sensor in the dashboard must change the BCM OR NOT PLS HELP ME 

https://wirer.sk/easy_light/

Yes but the BCM are changed or no and where I find the cable 

Wirer I ask u other questions one touch automatically windows not work in my fabia I have only tow windows electrical

I didn't change the BCM, it works on the original in my case

Ok thanks

15 hours ago, RABAH said:

Wirer I ask u other questions one touch automatically windows not work in my fabia I have only tow windows electrical

You don't have auto and cannot change it.