Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
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1999 Toyota Tacoma
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1999 Toyota Tacoma
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Wiring for trailer lights doesn’t have to mean splicing into factory wiring. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs right into the existing tail light connectors behind the lights. The powered converter and pre-fit connectors make it a plug-and-play job that keeps the factory wiring untouched and hidden once installed.
This harness gives you a standard 4-flat trailer connector to power running lights, turn signals, and brake lights on your trailer. Once it’s plugged in, you’ve got the foundation needed for safe towing or for adding a 7-way setup later using a kit like the ETBC7.
The included powered converter draws power directly from the battery instead of your vehicle’s tail light circuit. That protects sensitive electronics while giving your trailer lights a steady signal. It’s an important feature when upgrading vehicles without a factory tow package.
If you’re planning to tow larger trailers with electric brakes or onboard batteries, this 4-pole harness is the first step. It connects directly to universal kits that add a 7-way plug and brake controller wiring, making it easy to expand your setup later without redoing the original wiring work.
Customer Satisfaction Score:
91% were satisfied with this product
9% of customers were not satisfied
Ratings & Reviews
Victoria H.
2/13/2025
Hi Thomas, as long as the wrong item was ordered within the last 60 days and it hasn't been installed or used, you are able to return it. Let me know if you would like help with creating a return label for it.
Brooke M.
5/15/2025
Awesome! So happy to hear that! What are you powering on your Bronco with this harness?
Brooke M.
5/19/2025
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Jenny N.
5/9/2024
Mike, I have heard of this before. When it happens it means that the harness has experienced an overload and generally is not fixable. It is unfortunately that it happened past the warranty time frame for the harness. I recommend taking a look at part # TK33VR if your 2022 Ford Bronco does not have LED tail lights or part # TK99VR if the Bronco with LED tail lights. We tend to see it happen less with the Tekonsha branded harness.