How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Boxer54 Your Own Question

Boxer54
Boxer54, Toyota Technician
Category: Toyota
Satisfied Customers: 1682
Experience:  ASE Master tech with L1 certification, Toyota Master Diagnostic Technician
12613057
Type Your Toyota Question Here...
Boxer54 is online now
A new question is answered every 9 seconds

Prius: I have a Prius 2011 and want to fit automatic headlights.

Customer Question

I have a Prius 2011 and want to fit automatic headlights. Do I just need to change the lights stalk to one with the 'auto' position as the car already has light sensor capability.
Submitted: 1 year ago.
Category: Toyota
Expert:  Boxer54 replied 1 year ago.
Thank you for trusting us with your Toyota question. There is much more involved with this installation than you think. All these functions work through the body ecu and integration relay which will both need to he replaced. It's also possible some wiring harnesses may need to be replaced. How much are you willing to spend on this?
Customer: replied 1 year ago.

If as you say I'd need to replace ECU & relays then what about using a conversion system such as a DEI545T unit to facilitate auto headlights. What wires would I need to tap into.

Expert:  Boxer54 replied 1 year ago.
I have no idea what that is, can you post a URL so I can look at it?
Customer: replied 1 year ago.
Expert:  Boxer54 replied 1 year ago.
Personally, I have never seen one of these units. Without having the instructions in front of me to look at, I couldn't begin to tell you where to wire it in. What I can advise is to get a professional installer to install it. That way, the burden is on them for a proper installation.

That having been said, and with no knowledge of this unit or how it connects, I would be very careful of this in your vehicle. Since we will be dealing with computerized functions on this vehicle, there is the possibility of some unwanted issues. There is a high speed data network connecting the various computers in this vehicle, so, any disruption can cause issues in other systems.
Customer: replied 1 year ago.
Here's a link to the wiring diagram: http://www.directeddealers.com/manuals/ig/accessories/254521_545T_OK-7I_to_current_Installation_Guide.pdf

What do you think.
Expert:  Boxer54 replied 1 year ago.
Give e a bit to look over this information.
Expert:  Boxer54 replied 1 year ago.
Here's where this will be a problem. Each wire coming out of the light switch does multiple functions. It is a ground sided circuit and each wire actually tells the body computer what is wanted via varied resistance based on the different positions. The unit you are looking at won't work with this system. You may try it and get limited functionality, or based on how it works, it could change the wiring resistance enough that you get totally unwanted functions. Overall, not a good idea in my opinion.
Boxer54, Toyota Technician
Category: Toyota
Satisfied Customers: 1682
Experience: ASE Master tech with L1 certification, Toyota Master Diagnostic Technician
Boxer54 and other Toyota Specialists are ready to help you
Customer: replied 1 year ago.

In your response you have described the resistance ladder network that enables the steering wheel controls to be recognised so the corresponding switch is correlated to the resistance relating to an individual steering wheel control. The light switch does not operate in this way as it is hard wired to the light control stalk. I thus lost faith in your response above and feel I'd be better off talking to an Auto Electrician with access to the Prius wiring diagram.

Expert:  Boxer54 replied 1 year ago.

The light switch does multiple functions via varying resistance through only 2 wires(for the headlights) through the body ECU. This is from the wiring diagram, which I studied closely looking for a way to install the system you wanted. I am a Toyota master and Hybrid certified and I never mentioned anything about steering wheel controls.

Expert:  ToyotaTom replied 1 year ago.
Hello, and thank you for choosing Just Answer to help you with your questions!

I do agree that I would not recommend the nite lite system. They tend to be finicky and don't always work real well. But I've also installed them and have them work perfectly fine. The solar sensor is sub par if you ask me, that tends to be most of the cause of problems.

However, you CAN install it and have it "probably" work fine in your Prius. Any inconsistencies would be due to the solar sensor, NOT your Prius. Your headlight circuit is pretty simple, ground the parking light wire and the parking lights turn on. Ground the headlight wire and they turn on. There is no variable resistance circuit for these systems.

Installation would be pretty straight forward, through I would recommend a professional installation.

If you would like me to get detailed wiring connection information I can do that, however due to the nature of the Prius and with the lack of readily available power sources with enough current capacity to safely run the system, it may be a little tricky, and you may have to extend wiring to make it reach where it needs to go.
Customer: replied 1 year ago.

Hi Toyota Tom


Thank you for your answer above and it is perfectly satisfactory. Had I had a straight aswer like yours from the other guy I would have been more than satisfied. The only reason I didn't completed the "Rate to Finish" tab is that it told me I'd be up for yet another $22. Since I'd already parted with $22 already to the previous guy I've elected to reply to you and let you know what I thought. Not sure where to go from here to finish this off with out yet more expence.


Cheers and have a great 2013.


Colin

Expert:  Joe replied 1 year ago.


Hello,





Thank you for using
justanswer.com, my name is Joe and I will be happy to assist you with your
concern today.





Just seeing if you still
need assistance with this problem?





Thanks,



Joe

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • THANK YOU, THANK YOU, THANK YOU!! I've got my baby back. Tomorrow I will get a tank of high octane, remove the top, go for a long long ride and enjoy my car. THANK YOU! Jughead USA
< Last | Next >
  • THANK YOU, THANK YOU, THANK YOU!! I've got my baby back. Tomorrow I will get a tank of high octane, remove the top, go for a long long ride and enjoy my car. THANK YOU! Jughead USA
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • Chris (aka-Moose)

    Auto Technician

    Satisfied Customers:

    278
    16 years of experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)

    Auto Technician

    Satisfied Customers:

    278
    16 years of experience
  • http://ww2.justanswer.com/uploads/EU/eurotec/2012-6-11_13153_mpjaphoto.64x64.JPG Marty's Avatar

    Marty

    ASE Certified Technician

    Satisfied Customers:

    167
    ASE & Bosch Master Tech. 30 years experience.
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    Toyota Technician

    Satisfied Customers:

    1132
    ASE Master Technician advanced level specialist. Wisconsin certified emissions state inspector
  • http://ww2.justanswer.com/uploads/CA/caprio23/2014-4-30_201741_20121205122939.64x64.jpg Anthony's Avatar

    Anthony

    ASE Certified Technician

    Satisfied Customers:

    373
    ASE Master Automobile Technician with over 20 years exp. in this field.
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    9
    Toyota tech. ASE Certified Technician
  • http://ww2.justanswer.com/uploads/SK/skyvisions/2012-6-9_23736_JACropped3.64x64.jpg Skyvisions's Avatar

    Skyvisions

    ASE Certified Technician

    Satisfied Customers:

    11403
    Toyota Master Diagnostic
  • http://ww2.justanswer.com/uploads/genchigenbutsu/2009-05-09_003043_cimg16431.jpg Genchi Genbutsu's Avatar

    Genchi Genbutsu

    Toyota Master Technician

    Satisfied Customers:

    3425
    Toyota Certified Master Diagnostic Technician, ASE Master Technician with L1 Advanced Engine