Auto-dimming mirror does not work
I have bought a used 2010 Focus SES with auto-dimming mirror, but it does not work at all. I have tried to cover the front sensor and used a torch to beam into the rear sensor: nothing. The corresponding fuse is ok.
Do you have an idea what to check?
I am an electrical engineer so I should be able to measure the voltage on the plug if I would have a wiring diagram.