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Are both sides out? Or do you have a working module?
You can swap the working module to the other side. The movements will be backward but if you can communicate with it, you know the harness is ok.
If you cannot communicate with it, the pins inside the connector for the harness are probably corroded to the point where they are not making good contact.
Either replace the headlamp assembly or code out adaptive by removing option code $524 and defaulting the coding on the car, at the very least FRM.
Not sure if you can dissemble the pin connector and clean/replace the pins.
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