The way it REALLY works, is, Hijack allows setting of the button illumination level from the front panel. The code there most likely assumes NON-headlamps when setting it . The result is always saved to flash.

When headlamp sense goes "Active", the dimming code (two lines of C, posted MUCH earlier in this very thread), reduces the button illumination some.

And that's how it's going to stay for now.

cheers