To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Wiring up a trailer doesn’t have to mean cutting into factory wires. The Curt T-Connector plugs right into the vehicle’s existing wiring to give you a 4-pole flat trailer connector. No splicing or complicated tracing—just plug it in and it’s ready to go.
This harness delivers the basic trailer lighting functions through a standard 4-flat plug. It handles running lights, turn signals, and brake lights so your trailer stays legal and visible on the road.
The integrated converter keeps vehicle electronics protected while ensuring the trailer lights work correctly. Factory-style connectors make for a clean, secure fit that looks like it came from the factory.
Even if the vehicle didn’t come with a tow package, this harness is ready to go. It’s designed for straightforward installs that most DIYers can handle with basic tools—just connect, route, and hit the road.

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody. Andy here with etrailer.com And today, we're gonna take a look at this CURT T-connector vehicle wiring harness with four-pole flat trailer connector. Now, this is a custom fit harness that is designed to fit the 1998 to 2000 Isuzu Amigo, the 1998 to 2002 Honda Passport, and then the 1998 to 2004 Isuzu Rodeo, and then finally, the 2000 to 2003 Isuzu Rodeo Sport. So this harness is going to give you a four-pole flat trailer connector at the back of your vehicle to power your trailer signal lights. This is also going to be compatible with your five-pole, six-pole, and seven-pole adapters, but those adapters are sold separately. Also included is this detachable dust cap for the four-pole flat connector that covers up those connection points when this plug is not in use.
Now, a taillight converter is built into this wiring harness. Now because most trailers run on a two-wire system where the brake and turn signals are carried on one wire, the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of your trailer. This converter combines the brake and turn signal functions on your vehicle so that they run on one wire to properly activate your trailer's taillights. This will not affect how your taillights on your vehicle operates. The maximum amperage for the stop turn lights is three amps per circuit.
And for the taillights, it's five amps per circuit. This converter is also constructed using surface-mount technology for consistent, reliable performance, maximizing trailer light yield and intensity, while producing minimal heat, ensuring superior operation in rough road conditions. This also includes some double adhesive tape so that you can mount this converter box in an out of the way location when you are installing this harness. Now, this custom fit T-connector wiring harness has these T-connector plugs that are going to plug into your vehicle's wiring harness, which is located behind your driver side and passenger side taillights. You will have to remove the taillight assemblies to access this harness.
And what's great about this harness is there's not gonna be any cutting or splicing of wires. And then once installation is complete, the four-way connector is going to be stowed beneath your vehicle near your trailer hitch. A mounting bracket is recommended to keep this connector secure and that is sold separately from this harness, but you can find a compatible mounting bracket here at etrailer.com. It is also recommended that you use a small amount of dielectric grease on all of your electrical connections. The plugs on your vehicle and the four-pole flat connector itself, that's going to help prevent corrosion.
So on your screen, I am including our item number for a tube of that dielectric grease and you can just take that item number and put it in the search field of our website and that will take you to that grease and you can add that to your order if you so desire. Also included with this is going to be a self-tapping screw so that you can mount this wire for a good ground connection and also some cable ties to secure any slack in your wires and make sure everything is nice and tight and secure. Instructions are also included to walk you through the installation process. And that's gonna conclude our brief look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me.
Ratings & Reviews
Let you know when I install it
Great help
thanks
Easy to install and work's perfect with no issues. Very good product for the DIY types.
Product worked great and it got here in a timely manner. So far the harness works great, and the site was very easy to navigate.
I received the item on time. It was just as described. I installed wiring harness on my truck with no problems at all. When I needed a little more help with the installation, I just viewed the video on U tube. The works great with no problems.
Perfect fit for my '99 Rodeo. The trickiest part was getting the plugs through the bumper up to the taillights, but I used a flexible wire cable to fish it through, and it worked well. I drilled a pilot hole for the ground wire attachment into the pad that holds the driver side rear body mount after scraping off the dirt and paint. The included self tapping screw did the rest. The included zip ties were a nice touch keep the wires tidy.
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