Parts Needed To Add A Brake Controller To A 2024 Toyota Highlander
Updated 01/19/2026 | Published 08/11/2024
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Question:
Just want to confirm all I need is this wiring harness pluss a barke controller to install a 7 pin plug on my 2024 Toyota Highlander? This takes care of the issue of the brake controller backfeeding 12 v into the brake circuit and causing problems so I dont need a seperate diode? I understand the convience of using a Tekonsha brake controller but I should b able to use other controllers as well? Lastly when I bought my Toyota I got them to throw in the trailer light modlule and the 4 pin connector wiring harness if I use this Tekonsha custom harness I shouldnt need the two parts I got from Toyota, correct?
asked by: Frank T
Expert Reply:
Hey Frank,
The Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter # TK57VR would work as long as you have a factory connector in the rear cargo area to plug into for your light functions. This connector is typically hidden under the trim panel on the driver's side, usually there's a cup holder you can pop out to get to it. You shouldn't need the other wire harnesses but I would hang onto them as a backup just incase.
You can use the included brake controller wire harness to connect to a Tekonsha brake controller or you can splice into the harness from another brake controller. Personally, I recommend going with the Redarc Tow-Pro Liberty # RED52VR and using part # RED48FR to mount the control knob into the dash in a blank for a more factory look. The blue, red, white, and black wires from both harnesses and be matched. together color for color.
The # TK57VR doesn't include a mounting bracket so I recommend also picking up a no-drill bracket # 18136 and 7-way bracket # 18138 to make mounting the 7-way easier.
(click to enlarge)
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Robin H.
1/19/2026
Hey Frank, how did everything go with the Tekonsha wiring harness on your Highlander? Did the connection to the factory plug and brake controller setup work out the way you wanted? Your update could make it easier for others wiring a 7-way on the same vehicle.