Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
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2008 Ford Explorer
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2008 Ford Explorer
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Trailer lights can pull more current than a vehicle’s tail light circuits are designed to handle. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector uses a powered converter module that draws power directly from the battery. That protects the vehicle wiring from overload and keeps the trailer lights operating as they should, even when running multiple bulbs or LED lights.
A lot of lighting problems come down to not having a clean power source. This harness includes a dedicated 12-volt line that feeds the converter straight from the battery instead of pulling power through the vehicle’s tail light circuits. It gives consistent output for running lights, turn signals, and brake lights, so everything on the trailer stays bright and synced.
Wiring up a trailer connection can look intimidating, but this setup keeps it simple. The T-Connector plugs inline with the vehicle’s factory tail light connectors, so there’s no cutting or splicing involved. Once connected, you just run the included power wire to the battery and mount the converter box in the open cavity below the driver’s side tail light.
The included 4-pole flat connector gives you what most small and mid-size trailers use—running lights, turn signals, and brake lights. It’s the standard hookup for utility trailers, campers, or boat haulers, and it’s ready to plug into your trailer wiring right out of the box.
Earlier versions of this harness used an older converter that could short under heavy load. The updated design in this model uses a newer high-amperage converter box that holds up better over time and handles more trailer lights without issues. It’s made to deliver stable power every time you hook up.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
Michael
5/25/2026
Work good so far used it twice.
Lazer S.
5/25/2026
Barbara
10/21/2020
The Curt wiring harness is still functioning a year after purchase and months of sitting idle.
Jenny N.
2/10/2022
The powered tail light converter connects directly to the battery to avoid overloading the vehicles electrical system. We do have a great FAQ that provides ideas on ways to route the power wire. There is non powered harness for the 2019 Ford Flex. It is part # 118472.
Jenny N.
3/23/2023
It sounds like the box and wiring had a tough journey. I checked and this harness is a fit through to 2019 Ford Flex. Customer Service will be in touch with you in case there is any damage or missing parts.
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James D.
5/27/2026
Love to hear this Kerry! Smooth and easy install is always a win. We appreciate your kind words and thanks for choosing etrailer!