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Wiring up trailer lights usually means tapping into factory wires, but this harness eliminates that step. The Curt T-Connector plugs in line with your existing tail light wiring to create a clean 4-flat connector. It’s a direct plug-in design, so there’s no cutting or splicing needed to get your trailer lights powered and working properly.
This harness includes a powered converter that draws power directly from the battery rather than relying on the vehicle’s lighting circuit. That helps protect the vehicle’s electronics and ensures consistent voltage for your trailer lights. The converter keeps turn signals, brake lights, and running lights bright and steady, even with extra load from LED setups or accessories like bike rack light kits.
The 4-pole flat connector gives you all the main trailer lighting functions—running lights, left and right turn signals, and brake lights. It’s also the same connector style used on popular light kits for racks and small trailers, so you can easily plug in and go.
The harness routes through existing panels and grommets for a tidy finish. Once installed, the wires stay hidden behind trim panels and out of sight, leaving only the 4-flat connector where you need it. The result is a factory-style setup that looks clean and professional without extra drilling or exposed wiring.

Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews

Laura E.
6/14/2017
Thanks for bringing this to our attention, Terry. The red box attached to the power wire is the fuse holder.

Michael
6/18/2024
Excellent. Works as it should. I have not had any issues with the product.
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Rachael H.
7/25/2017
Thanks for the info Dave. This is a common problem with vehicles that have the trailer lamp out detection monitoring system. The European car companies were leading the way with this technologies. You can install load resistors like P230004A-2 to prevent the light out sensor issue. If you dont use it that often you may not be too worried about this.
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