Recommended Wiring Harness to Add a 7-Way Connector to a 2019 Toyota Highlander
Updated 08/29/2026 | Published 08/23/2026
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Question:
Do you have kits and instructions to install a seven pin electrical on a 2019 Toyota Highlander with factory hitch?
asked by: Mark B
Expert Reply:
We sure do Mark! We even have installation videos that'll show you how to install the parts on your 2019 Toyota Highlander.
To add a 7-Way connector to your 2019 Toyota Highlander, I recommend the Universal Installation Kit for Trailer Brake Controller item # ETBC7, the No-Drill Bracket item # C57202, and the Curt item # 56042 if your Highlander only came with a factory hitch and not a 4-way connector.
The Curt item # 56042 is 4-way connector that is designed to plug into a factory port, which is located behind the driver's-side interior trim panel in your rear cargo area. You will need to have 4-Way connector when you install the Universal Installation Kit item # ETBC7, because it sends your Highlanders lighting signals to your trailer.
The Universal Installation Kit item # ETBC7 includes a 7-way and 4-way trailer connector, along with all the wiring and circuit breakers you'll need. The item # C57202 can be used to attach the 7-Way to the crosstube of your factory hitch without having to drill.
I attached a diagram below that shows how to wire up the Universal Installation Kit item # ETBC7. You'll need to plug it into your 4-way to get the lighting functions for your trailer. You will then connect the blue wire to the blue wire on the brake controller, connect the black wire to the positive post on your Highlander's battery, the white wire to a suitable ground nearby, and the yellow wire to the reverse circuit. This will provide you with the ability to control your trailer's lights, brakes, and also provide you with a 12v power wire for you trailer's battery.
I attached all the installation videos for these parts below so you can see how to get them installed on your 2019 Highlander.
What kind of trailer are you planning on towing and do you already have a brake controller? Feel free to answer this and throw in any other questions you have, where it says Add Comment.
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Product Page this Question was Asked From
Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
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- Trailer Brake Controller
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- etrailer
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