Hi Klaus

Thanks - I will share your diagrams with the installers on my Nav System - I wanted to restate the problewm I have briefly:

When my Nav System Setting for "Night-time" mode is on, the display should toggel between gray for daytime and black for nighttime. When this setting is set to "off" the display is always gray.

My DRL are on during day - so when the mode setting is "on" my display is black (during day - it should be gray). At night my headlights are on along with my DRL (I have used the jump to keep them on) so the display is black. If I turn off the mode the display is gray at night (to bright).

So my lights work proper (including the DRL that I jumped) - it seems to me (based on your information) that the power source can be changed in order to make this mode work properly.

Any additional comments?

Again thanks for your expert insight