good evening, did you finally make it? I also have doblo 2011. I tried to find the cables that lock and unlock, I found only the unlock cable (purple/red Cable in black/blue connector position N.51).
but I can't find the lock cable.
any help would be welcome, Thanks
Maybe not much good but years ago a lad in the Fiat garage said that the way the Ducatos worked was that polarity of the signal was reversed to lock and unlock the door using the same cable.
Would seem a obvious way with a DC solenoid
It would require both solenoid \ motor wires to change polarity could be done with a rotary relay 1 pulse changes relay VW used them on 6 volt headlamp dip relay many many moons ago
Think double pole change over switch X linked or in the body computer