Trailer Brake Controller 4.6 - Toyota Nation Forum : Toyota Car and Truck Forums
 
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post #1 of 5 Old 12-26-2017, 07:44 AM Thread Starter
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Trailer Brake Controller 4.6

2018 Tundra
4.6 engine.
Toyota no longer supports a Tekonsha brake controller. They removed the standard 4-pin connection.
The 5.7 engine has an controller built in, the 4.6 does not.
The dealer says that Toyota sells an add on controller that will work.
My question?
Does the add on controller use the trucks computer, or is it a stand alone system, like the Tekonsha.
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post #2 of 5 Old 01-25-2018, 02:08 PM
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2018 Sequoia Brake Controller

Hi,
I was wondering how you found out about Toyota no longer supporting the Tekonsha controller? I've been in contact with Tekonsha tech support and my Toyota service center and no one has managed to provide that information. I've been scratching my head trying to figure out what connector I need. There is an unused connector in the wiring harness behind the driver's side scuff panel but it doesn't mate with the Tekonsha Toyota connector that previously fit the 2017 Sequoia. The owner's manual says there should be a brake controller connector in that location so I'm assuming that is what the connector I see is.
Any suggestion you can offer would be great.
Also, I've got the 5.7L V8 w/ factory tow hitch, but as far as I can tell there is no built in controller.
thanks
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post #3 of 5 Old 01-25-2018, 07:23 PM Thread Starter
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Toyota Brake Contoller

Here's what I think I've learned:
2018 Tundra with a 5.8 engine and a tow package will have a Toyota brake controller just to the right of the steering column.
2018 Tundra with a 5.8 engine without a tow package does not have a connector for ANY brake controller.
2018 Tundra with a 4.6 engine does not have a tow package option, meaning there is no brake controller connection.

If you do not have a tow package you can have one installed.
or
In my case, the truck came with a Class III hitch and a 7/4 way trailer socket from the factory.
I'm installing the Tekonsha controller by wiring it directly to the battery/brake switch/7 way trailer socket and the trucks ground.

I am very disappointed with Toyota. Eliminating an easy way to install a brake controller is really a stupid stunt. I suspect they did it force folks to buy their tow package. My dealer was completely unaware of this when I told them I was planning on towing a lightweight travel trailer. If I had been aware of this, I would have most likely ramped up to the 5.8 engine.

I'm guessing your Sequoia may be similar.
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post #4 of 5 Old 04-14-2019, 07:10 PM
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2019 Tundra Trailer brake blue wire inside the cab...

I just bought a 2019 4.6L Tundra. The blue wire power feed to the 7-blade is available inside the cab, passenger side, under the plastic side panel in front of the front passenger door. It's in a white unused connector. The black wire next to it is 12 volts (voltage always present). The beige wire on the brake pedal switch provides 12 volt signal when the brake pedal is depressed. Running wires for the black 12v and the blue feed to the 7-blade, from the passenger side to the driver side, is not difficult. If you are mounting a 3rd party (I am installing a Tekonsha Voyager), be careful not to mount where it can be propelled by the air bag below the steering column. Check out the link where I found this information - it was for 2018, but is same for the 2019.

https://www.tundras.com/threads/2018...install.25884/

My thanks to the author of the information found there - pictures there were very helpful.
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post #5 of 5 Old 04-16-2019, 06:43 AM
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Installing a brake controller on the 4.6L is very easy. I've accomplished this on mine as well. This is the harness that you need to get. It has a ground eyelet.

Tekonsha 3031-P Trailer Brake Control Harness 2-plug Wiring Adapter - Toyota
Amazon Amazon

Take the white connector apart to get the wires out and you can plug them into the factory wiring that's under the passenger side dash panel right where the kick panel is. I used a scotch lock to run red wire to the tan wire in the brake switch. You can easily verify everything working with a multimeter and having someone step on the brake and checking the connector in the rear of the truck of the 7boin connector.

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