Regarding the night illumination wire, I don't know how the dashboard illumination sensing wire functions on a car with daytime running lights.

If your car has its dashboard lights on all the time, then I would assume that the empeg would think they were on all the time. Just set the empeg to be 100 percent with both the lights on and off.

The only way the empeg can tell if you want its display dimmed is through your car's illumination wire. If that illumination wire is lit all the time, there's no magic way for the empeg to tell the difference between night and day. It doesn't have a photosensor. Although I suppose if you were really cool you could rig up your own trick with a handmade photosensor system.

Hm. It seems to me that a car sold in a country where DRMs are required would have some kind of solution for this already built-in. I wonder how it works.