Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
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2017 GMC Acadia
These items fit your vehicle
2017 GMC Acadia
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Wiring up a trailer usually means finding and tapping into the right wires, but not with this setup. The Curt T-Connector plugs directly inline with your vehicle’s taillight wiring, giving you a working 4-pole flat connector without splicing a single wire. It’s a straightforward plug-and-play design that connects cleanly behind the rear trim panels for a simple, hidden install.
Modern vehicle wiring isn’t built to handle the extra load from trailer lights. This harness uses a powered converter that takes its power straight from the battery through a dedicated hot lead. The taillight circuits only act as signal triggers, while the converter supplies all the current needed for the trailer lights. That keeps your factory wiring isolated and protected if the trailer ever shorts out.
The included black power wire runs to the positive terminal of your vehicle’s battery, giving the converter consistent 12-volt power. That setup ensures your trailer running lights, turn signals, and brake lights work correctly every time you tow. The harness only draws power when a trailer is plugged in, so there’s no drain when you’re not towing.
Once installed, you’ll have a standard 4-way flat connector ready for most small trailers or lighted cargo carriers. It provides running, turn, and brake light functions in one simple plug that matches what most trailers use today.
Because it connects inline with factory plugs and stays tucked behind interior panels, there’s no messy wiring or visible splices. The finished install looks clean and professional, with just the 4-flat plug accessible when you need it for towing.
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews
Jon J.
1/16/2021
I installed the trailer light kit on my 2019 Tiguan about a year ago. It works fine for the lights on my utility trailer. Rather than running the 12V power wire all the way to the front of the car, I installed a cigarette-lighter end of it and plug it into the 12V accessory plug in the cargo compartment. Works great.
Yaakov M.
6/2/2022
1-Year Follow Up - I have only used the hitch for one haul so far but everything works well.
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David M.
3/17/2020
Have not had any issues with the harness. Works perfectly.