Installing a Tekonsha Primus IQ Brake Controller on 2019 Subaru Ascent


My ascent had the trailer hitch installed by the dealership and does not have the connector under the dash. How do I install a connector? The dealer gave me this to install.


Expert Reply:

The photo you sent looks like it may be what you need to hardwire to the Tekonsha Primus IQ Trailer Brake Controller # TK90160 to as a step of the installation.

To install this brake controller in your 2019 Subaru Ascent without the factory tow package you need to start by adding a 4-way, the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118790; I have added a link to an installation video of this connector on a '19 Ascent for you to take a look at.

You will also need the Universal Installation Kit for Trailer Brake Controller # ETBC7, which will give you a 7-way connector, circuit breakers and the rest of the hardware needed to install a brake controller like the Primus IQ.

If you take a look at the article I linked for you on installing a brake controller from scratch it goes into the specific details about the exact process. I have also linked a helpful wiring article for you to check out which I recommend reading.

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expert reply by:
Kyle S

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