2011 Prius: Why is it that when I turn on my running/ headlights my instrument panel darkens? It doesn't go out but it is hard to see. Is there an adjustment?
And if you roll the dial completely in direction 1 you will encounter a detent where the instrument panel will be full daytime illumination. That is where I set it when driving in inclement weather during the day with headlights on.
Did you try this fix? I have mine rolled all the way in the direction of 1 and then you can push it a little further and it clicks in a super bright mode...that is where I keep mine!