OK, problem resolved.
A WARNING for anyone who would like to do BOTH doors at the same time.
Do one side at a time... or you can f... it up as I did
Turns out that the switches are assigned to sides. I did not realise that when I was switching electronics. Sure, the whole assembly is easy to navigate (no mistakes there), but then we have the microswitches to resolder to the old electronics.
And if you cut them (both sides) at the same time then you can grab the wrong one.
Just took me 5x the time it should have.
All works as designed.
With one weird thing.
Turn signal blinks.
Now, when I lock the car I get a turn signal double blink and when I unlock - single. And no horn beeps.
Before it would lock quietly and unlock with one beep. No blinkers (hazards) feedback. Or maybe one short one.
Could someone tell me what is the proper feedback from the car?
I know the beeps have some meaning, like single vs double.