Need wiring schematic headlight switch

If you go to https://techinfo.toyota.com you can subscribe for one day, one month or one year to access a wide array of technical information. You can from this site, download wiring diagrams, repair manual sections, etc.

I hope this is helpful to you.

 

The headlight switch just sends signals to the body ECU. To turn on the headlights ground pin 20, should be a red wire. Normal headlight operation will also turn on the tail lights by grounding pin 18, should be a yellow wire.

Headlight - Pin 20, Red
Tail Lights - Pin 18, Yellow
Auto - Pin 19, Green
Bright - Pin 11, Red
Bright Flash - Pin 17, Purple
Left Turn - Pin 15, Grey
Right Turn - Pin 13, Light Green
Ground Wire - Pin 12, Green

This is how my Prius appears to operate. While I believe this information is correct, I am not responsible for any damage arising from it's use. All information should be verified with a voltmeter.

 

There are 55 separate PDF files for wiring diagrams of the 2008 Prius. You can download each of these files, or only the ones you want. They can than be viewed and/or printed out. I first tried to access the TIS site using my iMac, but found it unworkable and opted to use my wife's PC with Vista Home. The files were all very readable, printable, etc. on Vista. There is no single file showing the wiring for the entire car. Each file shows wiring diagram and connectors used in that diagram.

 

When US market Prius cars are imported into Canada, everybody finds it easier to just use an aftermarket relay to run the headlights as DRL. It's not a simple plug-and-play project

I think Toyota refers to the "headlight switch" as the Combination Switch

 

Also, keep in mind the DRL relay and auto light sensor are for the Canadian market Prius only. That is why they don't appear in the US market Prius cars, which can cause a lot of confusion

 

I've got a TIS question: When using the daily subscription mode, does the day's subscription end at midnight, or 24 hours after the subscription was initiated (or something else)?
Tom

 

I've heard both ways, it probably depends on when you subscribe. Folks have reported that if you subscribe Friday mid afternoon, you will usually have the entire weekend

Or just join All Data. After my FJ download overwrote most of my Prius manuals, I joined All Data and was pleasantly surprised to discover they have pretty much the same exact information as TIS. Even the TSB's. Under $15 for an entire year subscription

 

I just found it in the TIS learn more page. It expires on midnight of the last day of the subscription. Thanks anyway. And thanks for the All Data tip.

Tom