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Wiring up trailer lights doesn’t have to mean cutting into your factory wiring. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs directly into the vehicle’s existing light connectors. This hidden, plug-and-lead setup keeps your factory wiring intact and gets you a working 4-flat trailer connection that’s ready for running lights, turn signals, and brake lights.
Many modern vehicles use lightweight wiring that can’t handle the extra load from trailer lights. This harness includes a powered converter that draws power directly from the battery instead of the vehicle’s lighting circuits. That setup protects the car’s internal wiring while giving the trailer the full power it needs for proper lighting. The inline fuse safeguards the module—if it ever blows, it only cuts power to the trailer side, never to your vehicle lights.
The included power wire runs neatly from the rear of the vehicle up to the battery, giving a direct power source for the converter. You can route it through the interior or underneath using existing grommets, keeping clear of heat and moving parts. It’s a straightforward job that keeps the install tidy and reliable over time.
Out of the box, this harness gives you a standard 4-pole flat connector for trailer lighting circuits. If you ever need to tow something with electric brakes or charge a trailer battery, it can easily be expanded using an adapter kit like an ETBC7 to add a 7-way connection. The Curt harness gives you a solid foundation for any towing setup down the road.
Ratings & Reviews
Completely as advertised.
Exact fit and works perfectly
Works great but definitely not any easy install. Having to run a power wire off the battery and snake it through the firewall and to the back is not for the average car owner.
Your wiring harness works perfectly! I’m very satisfied!
Works as expected, Never gave the wireing much thought since I installed it. I only use my trailer on occasion.
No pictures available at this time.
Installed this on a 2017 Honda Accord Sport (dual exhausts). This is probably the 5th or 6th hitch that I've installed on various vehicles and overall very simple. Hardest part was trimming the heat shields; to do this you'll need a pair of tin snips or a Dremel. It took me about 4 tries to get it "just right". With only three bolts and four nuts total you'd really have to try hard to screw this one up.
For 2016 Accord. Perfect engineering and install directions. Have recommended etrailer to many friends. Lighting kit as well
Installed on a 2017 Honda Accord Sport. Easy installation up until the power tap was required. I opted to chase the 12 gauge wire (included in the kit) along a factory wire harness through the drivers side door jambs and hook into an existing hot-on-ignition-off circuit using a customized add-a-circuit fused tap. Took me a good hour or so to get the wire run but it is completely invisible.
Note to Accord drivers; there are a number of factory-installed body "plugs" or grommets in the floor of the trunk underneath the carpet. I cut the core out of one of these plugs, cut the 4-wire plug off, ran the cut end through the grommet and out to the hitch, then crimped the 4-wire assembly back together. A little duct sealant to prevent air leakage and you have a seamless, no-cut no-drill installation!
We ordered a trailer hitch for our 2016 Accord. That went on just fine, exactly as it should. When we ordered the hitch we clicked through on the recommended wiring. However that turned out to be for the coupe not the sedan. They have different plugs. So we sent that back. We then ordered the wiring for the sedan. Two are listed. One for Accords with LED taillights, the other for Accords without LED taillights. Well, all 2016 Accords have LED taillights. Some also have LED brakelights. How do I know this? I call our local Honda dealer. They don't know. They call the service department. They don't know. I finally downloaded the Accord 2016 manual - a more detailed version than comes with the car and that gives the needed information.
Anyways ... we got this installed and it works fine. It would be difficult as a DIY installation since you have to run the 12 V line from the front of the car, underneath and into the trunk. The knuckleheads that installed it for us drilled through a drain hole in the trunk despite there being an existing grommet 18 inches away that they could have used. I'd suggest that if you have this wiring installed on your car you review the video for the 2015 Accord wiring installation and based on that tell your mechanics exactly what you want.
Easy install except for the hot wire to the battery. Luckily I found a [online] video where a guy was running a wire for an amplifier from the trunk to the battery. It would have been great if etrailer.com would have made one as they produce excellent installation videos. Unfortunately, the controller malfunctioned after very little use (hence the reduction of one star). I’d call it an infancy failure. However, etrailer.com’s excellent customer service helped me troubleshoot and determine it was a bad controller and worked with me to get a replacement (covered under warranty). Overall, very satisfied with this experience.
Kelly in customer service was great!
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Rich Y.
8/19/2020
Quite well actually,but I traded in my Honda aweek or so ago.