Auto Headlights ?

Search on the Gen III modification thread for automatic headlights. There's an extensive thread on this. The vehicle is capable of auto headlights but it wasn't enabled in the US for some reason, probably cost. In your case, you'll find a connector behind the upper glove box with a missing pin that is part of the setup. I had to remove the entire upper dashboard to rewire the sensor connector. I think the best feature of enabling this is the dashboard lighting changes with outside lighting conditions.

The mod requires running wires inside the dash to a connector on the left lower area of the interior and either using a separate switch or buying the Canadian version of the turn signal stalk that enables auto headlights.

 

And remember, beside rewiring the entire dash, folks would not see you as well during the daylight.

 

The mod results in both manual and auto headlights. The original manual mode is retained, particularly if one does what I did with the Canadian turn signal stalk.

 

There are a number of features that show up on other Toyota vehicles that don't show up on the 2010 Prius, and there are features on the Prius that don't show up on any other Toyota model. I believe Toyota set a price point for the US version that forced some "standard" features to be omitted that appear on Prii in Canada & Europe.

If you're familiar with wiring and working on cars, you can do the mod yourself - there are pretty complete instructions in the thread I described earlier.

 

Are you referring to this thread?

Automatic Headlights | PriusChat

 

Yes, it's a friggin' novel. Starts out with the OP discussing installing an aftermarket auto headlight module & sensor, then the community discovers that the car IS ALREADY set up for auto headlights but not wired. People with later Gen III's and level V versions discover that there's a connector right behind the upper glovebox to access the sensor signal, otherwise one has to remove the whole upper dash and add a pin to the existing sensor connector. Then there are discussions about how to turn the auto headlight feature on and off. Lots of detail, I'm in there a few times. Read the whole thing and develop your strategy. For the headlight stalk change-out, the thread about JDM steering wheels has some good instructions about getting the steering wheel off.

 

Yes it is a lot of information. I'm reading through it now. Haven't decided on whether to change the stalk out, I just want the auto dim function when driving in the rain.

 

I'd recommend changing the stalk. Much cleaner implementation.