Headlight sensor install

[biotope]

Originally Posted by CTScott

Correct

Finally managed to spare time trying out the installation. Some issue encountered, not sure if you could advice?

Without the relay connection for the parking lights, everything works well. It could auto on the headlight in the dark and off the headlight in the bright.

But when I made the relay connection, it will auto on the headlight & parking lights in the dark but fails to off the headlight & parking in the bright. I could hear the relay switching sound but the headlight & parking lights remain on.

Tried to change another relay, still having the same issue. Any idea what goes wrong?