First of all, I know that strictly speaking I am an outsider here, but I have an issue with a PSA group sister car, and thought that you kind folk could help me out.
My wife has a red '19 Grandland X and she asked me to retrofit electric folding mirrors to the car. I have already done this successfully a few years ago with my Alfa Romeo 159 and I am an experienced DIY mechanic. I managed to buy mirrors, window switch, and door control unit, wiring loom from a crashed car with folding mirror feature. My problem is that I cannot find anything on the internet regarding the logic used to set up the hardware. With the Alfa I had no such issues, everything can be found online. Alfa uses a door control unit in every door, which made the upgrade extremely straightforward: replace mirror, replace door control unit, replace switch in driver door.
My issue is that I do not know where the door control module is located in the vehicle. They are not in the doors, that is for sure.
I would like to ask for your help to set up the new hardware. Where is the door control unit?
Thank You very much!