Curt Brake Controller Wiring Harness for 2018 Toyota 4Runner

Question

Question:

I have a 2018 Toyota 4Runner SR5 premium. Do I need an additional wiring harness for this controller?

asked by: Jody

0

Expert Reply:

Hey Jody! If you have factory wiring with a tow port under the dash the Curt Venturer NEXT # C57SV is the better choice. This includes a custom wiring harness for a plug and play installation. It is worth mentioning that this is a time delayed controller, which really isn't the best for towing.

I recommend getting a proportional brake controller like the TriFlex NEXT # C67GV instead. Proportional brake controllers use accelerometers so the braking force on the trailer matches your vehicle. This will give you smooth and predictable braking for a much better experience and less wear on your brakes.

What are you towing with the 4Runner?

expert reply by: Robin H

0

Curt Venturer NEXT
(click to enlarge)

Jody

5/18/2026

I'll be pulling a Sunray 149 camper, with a dry weight of approx. 2300 lbs. A proportional seems like overkill?

Robin H.

5/19/2026

@Jody even with a lighter camper like your Sunray, a proportional controller is still the way to go. There really isn’t a situation where a time-delayed controller is the better choice once trailer brakes are involved. Proportional controllers simply brake smoother, react faster, and feel more natural behind the wheel.

Answer 1

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

view full answer...

Answer 2

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

view full answer...

Answer 3

That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary.…

view full answer...

Answer 4

To install a Redarc Tow Pro Liberty in your 2023 Toyota Tacoma Sport you will need the following parts: Redarc Tow-Pro Liberty Brake Controller item #RED24FR Plug-and-Play Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers item #RED99FR…

view full answer...

Answer 5

You're right, the mounting bracket is unique (in a good way) for the Curt TriFlex NEXT Trailer Brake Controller #C24VV. The bracket is smaller and all you do is put the included adhesive tape on the bracket and stick it wherever you like under…

view full answer...

Answer 6

There is a wiring kit for a brake controller Preston but it's not going to be a plug and play one. The 2025 Toyota Tacoma does not have a plug in brake controller port. Toyota stopped putting them in after the 2023 model. For your Tacoma, I…

view full answer...

Answer 7

Sure, I can help with that. I can see why the fitment notes are confusing. For a 2012 Toyota Tundra with the factory tow package and factory 7 way connector, you'll want a brake controller that plugs into the factory brake controller port under…

view full answer...

Answer 8

We can get you everything you need for towing with your 2017 Toyota Sienna XLE. By plastic shield, I believe you are referring to the appearance panel underneath the Sienna, and that will have to trimmed a bit in each of the hitches available for the…

view full answer...

Answer 9

Hi Joel! The easiest way to install a brake controller on your 2026 Toyota 4Runner would be to use the Redarc Tow-Pro Elite Brake Controller w/Custom Harness part #RED56CR. It is the same Redarc Tow-Pro brake controller as the RED44FR but has the…

view full answer...

Answer 10

Hi Jeff! To be perfectly honest, there is no difference between them. The Redarc Tow-Pro Liberty Brake Controller w/ Custom Harness #RED72CR comes to us already put together to fit your 2017 Toyota Tacoma, whereas the Redarc Tow-Pro Liberty Brake…

view full answer...

Answer 11

The Redarc Tow-Pro Liberty #RED24FR is the way to go over the Elite #RED44FR as you get the nicer functions of the Elite at a lower price. The Elite has the ability to be the more preferred proportional style of controller as well as a time-delayed…

view full answer...

Answer 12

For your 2023 Tacoma I recommend the B&W Tow & Stow 3-Ball Mount #BWTS10048B. This has a 5-1/2" rise and 5" drop which will cover most trailers you might tow with the truck. I would also add the InfiniteRule Locking Pins for B &…

view full answer...

Curt Brake Controller Wiring Harness for 2018 Toyota 4Runner

Products Featured in This Question

Product Page this Question was Asked From

Featured Help Information

Instructions

Continue Researching