2019 Subaru Ascent 4-Way and Brake Controller Install Kit


I have a Tekonsha P3 trailer brake controller, that I removed from my 2001 Dodge Dakota. I just purchased a 2019 Subaru Ascent and want to use the P3 to operate the electric brakes on my 1 axle utility trailer. I purchased the Tekonsha 3062-P plug in wiring adapter from you folks hoping this will solve my problem. My Subaru dealer is installing the hitch Monday. I looked up wiring diagrams on your site and it looks like the 4-pole plug that Subaru has will not supply a pole for electric brakes. I been a professional driver for 47 years/ just retired and I really dont want wires hanging out of the back end of my vehicle. What do you suggest? By the way, your website is awesome.


Expert Reply:

Your 2019 Subaru Ascent should have came with a 7-way installed at the rear of it if it came with the factory towing package. Since you are having a hitch installed currently and looking at wiring you most likely do not have the towing package and would need to install the correct wiring. You have to start with a 4-way for this like the # 118790 as this will be the base for the 7-way conversion needed to install and use the brake controller. Since normally this 4-way kit stores in the rear cargo compartment and comes out of the rear door when needed you might be able to find a grommet in the floor of the Ascent to get it to a 7-way adapter.

From there you would need to convert the 4-way to a 7-way so that you can install the P3 # 90195 brake controller. For that you will want the Brake Controller Install Kit and 7-Way Adapter part # ETBC7. I attached installation instructions and an install video for this product as well.

expert reply by:
Jameson C

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