Dash Dimmer Switch has no range

I'm a new owner of a 2015 Prius Three and I've never been in another Prius of the same model for comparison but it surely seems to me that my dash display is way too dim.

It's especially hard during the day when it's really bright outside. It's nearly impossible to see.

The display screen is about the same when the reverse camera is on. I can't even think about having my sunglasses on when backing out of a parking space.

As far as the dimmer, from the clicked position all the way to the other there is no change when the knob is turned except right before getting to the other stop. Once I nearly reach the other stop, the dash dims to nearly dark.

I've looked these up online and gasped at the prices so I do not want to replace this item if it's not at fault and there is something else causing this symptom.

 

The radio/navigation screen is set to daytime.

Are you saying there is a daytime setting for the speedo/mpg screen too?

 

I pulled the panel off and unplugged the cable this control was plugged into to make sure it was properly seated but this changed nothing.

There is a connector here that isn't connected. I'm going to assume this is probably for an option not present on my car?

 

Most of the problem lies in the spedo/MPG display and the one to the right that can cycle through the different engine/energy displays.

 

Well you could say mine has that now. All the way bright, which isn’t so bright to almost completely dark if I dial it all the way down.

Lights on or off turning the knob does nothing.

The only other thing that comes to mind with the mention of lights is in the car settings menu, daytime driving lights are set to ON. But, this should make the knob work if I’m reading things right.


iPhone ?