What Wiring do I Need to Get a 7 Way on the Back of My 2024 Subaru Outback Wilderness?

Updated 09/29/2025 | Published 05/14/2025

Products Featured in This Question

Pollak Black Plastic, 7-Pole, RV Blade-Style Trailer Socket - Vehicle End

(341)

$13.26

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

(2977)

$39.59

etrailer Ball Mount w/ Pre-Torqued 2" Ball - 2" Hitch - 2" Drop - 7,500 lbs

(390)

$43.82

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

(3417)

$127.95

Question:

I just put on a Curt hitch I got from you guys on my 2024 Subaru Crosstrek Wilderness Edition I want to install trailer wiring with a round 7 pin connector. The plug in my trunk has 6 pins. What do I need from you guys to make this work?

asked by: George W

Expert Reply:

Hello George,

In order to get a 7 way on the back of your 2024 Subaru Crosstrek Wilderness, you will need to start with the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118467.

The # 118467 will get the 4 flat on the back, but then you will have to build on top of it by install the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires # ETBC7.

The # ETBC7 is a little more work to install than the # 118467, as you will need to run a power cord from the batter, some Amps along the way, and a brake wire to the rear of the Subaru as well. I do not have an install video on a 2024, but I did attach one on a 2015 so you can see what you are getting yourself into.

Need a ball mount, check out our etrailer Ball Mount w/ Pre-Torqued 2" Ball - 2" Hitch - 2" Drop - 7,500 lbs # e67DR. I really like how our hitch ball comes in a black nickel plating, really gives it a nice sleek design.

What are you looking to tow with your Subaru?

expert reply by: Kate F

ETBC7 Wiring Diagram
(click to enlarge)

Kate F.

9/29/2025

Hey George, Did you get a chance to install the wiring and brake controller kit on your Subaru? I'm curious to know how it went for you, as it could help others looking to do the same setup.