Looks like it is on the passenger side. See page 17 - https://techinfo.subaru.com/stis/doc/accInstallGuide/GC7 Tow Hitch - Installation Instructions - English - 2019OCT23-merged.pdf

 

Thank you for that! However, I guess i'm having a low blood sugar moment because NONE of the diagrams are looking like anything I'm looking at in the interior and /or under the car...

 

Looks like the connector is towards the opening of the hatch now... the instructions don’t show the annoying routing of the Gen5 harness...

 

FOUND IT!! Given the change to the Global Platform this year, I checked the vids for the Ascent. . You gents were both right. It is tucked up high in the rear, passenger side corner of the spare tire well . Good news is that there is actually no disassembly of the car needed ( beyond lifting the foam tray out) to get access to the connector. For this T-One brand (recommended by Etrailer) all I had to do was plug in the one connector and secure the converter and wires with double sided tape and zip ties. That part took all of 5 min once I knew where to put it. Sweet!

 

Just got my hitch installed at the dealer today and here is my factory harness. I plan on doing a 7-pin install using parts from e-trailer and also a Red Arc brake controller. With this factory 4pin harness, what wire would I tap into for brake signal?

Also, I’m assuming it’s better to pull the signal from back there vs the brake pedal with the adaptive cruise controls ability to brake.

 

And now I'm reading for a brake controller you have to pull from the brake pedal for voltage reasons. However, I do want to note that the Red Arc Tow Elite only requires a brake light signal, so I believe the below does not apply.

"If you are setting up a hardwired controller for brake operation not only do you need 12v going to the 7 pin and the brake controller you need to intercept the signal(voltage) coming from the car to activate the brakes themselves. You tap into the wire on the brake pedal that only has voltage when the pedal is depressed. This in turn causes the controller to send voltage back to the trailer brakes to activate. You cannot just tap into the brake lights to do this, although it would be a **** of a lot easier."

 

And now I'm reading for a brake controller you have to pull from the brake pedal for voltage reasons. I'm I reading this correctly, or can you still pull the "signal" from the harness? Being that the harness is different than just pulling from the brake light wiring.

"If you are setting up a hardwired controller for brake operation not only do you need 12v going to the 7 pin and the brake controller you need to intercept the signal(voltage) coming from the car to activate the brakes themselves. You tap into the wire on the brake pedal that only has voltage when the pedal is depressed. This in turn causes the controller to send voltage back to the trailer brakes to activate. You cannot just tap into the brake lights to do this, although it would be a **** of a lot easier."

I wonder if that's because the voltage from the pedal varies depending on the brake pressure. The lights' voltage is either ON or OFF. Using the brake pedal's voltage makes sense since the controller can send a similarly modulated brake pressure to the trailer.

 

Agreed on the above. Not I just need to confirm which wire from the bundles I posted above should be tapped for that signal.