Parts Needed to Add Brake Controller to 2026 Ford Transit T350

Updated 03/05/2026 | Published 03/02/2026

Products Featured in This Question

Redarc Tow-Pro Liberty Brake Controller w/ Universal Wiring Harness - Dash Knob - Proportional

(3222)

$217.00

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

(5)

$81.09

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

(278)

$71.73

Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires

(3554)

$118.68

Roadmaster Universal Stop Light Switch Kit

(706)

$130.66

Question:

Need assistance on a 2026 350 Ford transit Trailer break kit.

asked by: Michael T

Expert Reply:

Hi Michael! Do you already have a 7-way on your Transit? If you don't have wiring, you need to start by adding a 4-way with # C56327 (single rear wheel) or # C42MJ (dually). Once you have your 4-way installed you can upgrade it to a 7-way using the # ETBC7.

Then for a brake controller, I recommend the Redarc Tow-Pro Liberty Brake Controller # RED52VR. The Liberty is simple, reliable, and installs just about anywhere in the cab. The main unit is hidden and the control knob installs in the dash. This comes with a universal wiring harness for installation.

What are you towing with your Transit?

expert reply by: Robin H

Tow-Pro Liberty Control Knob
(click to enlarge)

Michael T.

3/4/2026

Robin, essentially, we will need to by three products to be able to have the break controller. We won't be hauling much, just a unitality trailer

Robin H.

3/4/2026

@MichaelT that is correct, the 4-way based on your configuration, the 7-way upgrade kit # ETBC7, and then the brake controller itself # RED52VR. The wiring is required for the lights on the trailer and to carry the brake signal from the controller back to the brakes. Once you get those installed you can run the electric brakes on any trailer.

Michael T.

3/4/2026

Also, because there is no T1 connector on this van, would we have to splice into the ford wiring harness?

Robin H.

3/4/2026

@MichaelT both of the 4-way wiring harnesses plug into the connection points behind your taillights. The hot lead runs up to the battery. The 7-way kit has its own wiring, none of the trailer wiring will require splicing into the Ford wiring. The only vehicle wiring you will have to splice into is the cold side of the stop light switch with the brake controller wiring harness. If you don't want to splice into that wire, or if it isn't accessible, you can use the Roadmaster Universal Stop Light Switch Kit # RM-751000.

Ken

3/5/2026

I purchased this brake controller at least 2 years ago and installed on a 2020 Palisade, which only had the 4 wire connector at the hitch. The installation went as well as I could ask for. Fortunately Trailer had an installation video available which helped me locate the correct brake wire. The controller "learned" well and has worked flawlessly since installation. I really like the small controller know which is extremely unobtrusive in my dash.