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Warranty: One-Year Limited Warranty
Electrical System Type: 3W
Output Type: 4-Way Flat
Tail Light Circuits: 7.5 Amps
Turn and Brake Circuits: 3.0 Amps
Installation Difficulty: Novice
Installation Time Exact (Minutes): 10
If your vehicle is not equipped with wiring for towing a trailer, CURT custom wiring is the ideal solution. A custom wiring harness -- also called a T-connector -- is a simple, plug-and-play electrical device that plugs into your automotive electric system and provides a standard, universal trailer wiring connection. This is done using two or more vehicle-specific, OEM-compatible connectors to plug into the taillight assembly, eliminating the need for cutting, splicing and soldering during installation. Custom wiring harnesses are made vehicle-specific, and while they are not available for all vehicles, they do offer one of the fastest, easiest and most secure ways to wire a vehicle for towing. This particular plug-in harness provides a 4-way flat connector socket and is designed to be a custom wiring harness to fit certain years of the Toyota Sienna (to verify your vehicle compatibility, see application info). It comes with all necessary wiring components to establish a reliable trailer wiring connection, as well as a dust cover to keep the connector clean when not in use. You have a picture in mind of your next destination -- maybe it's the boat landing at your favorite fishing spot, maybe it's a campsite that overlooks one of nature's masterpieces, or maybe it's the next big jobsite. However, turning that picture into a reality takes more than just daydreaming. It takes a solid connection and the right amount of power. CURT custom wiring is made with some of the most sophisticated technology in the industry and is designed to install with ease, giving you a long-lasting electrical connection for your towing hitch setup.

CURT offers a variety of high-quality trailer hitches and accessories for select vehicle models. Find the perfect fit for your towing needs at TowUniverse.
CURT, a Lippert brand, offers a complete line of towing products and is the leading manufacturer of custom-fit trailer hitches. We offer the broadest selection of custom-fit hitches, and each one is designed, welded, and coated in Wisconsin.
CURT is also a leader in flat towing products, as well as 5th wheel, gooseneck, and weight distribution hitches, ball mounts, electrical components, cargo solutions, and other towing accessories.
For everything from passenger cars and vans to full-size pickups and SUVs, CURT is 'The First Name in Towing Products®.'
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1 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 1998 - 2003 | Toyota Sienna | Installation Time: 30-60 minutes |
Yes, the CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Sienna Trailer Connector Kit (Part #BKDK55418) is designed to fit the 1998-2003 Toyota Sienna.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Sienna Trailer Connector Kit (Part #BKDK55418) fits 1998-2003 Toyota Sienna models. The 2003 model year is the last year covered by this part number. For newer models, check for an updated version.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Sienna Trailer Connector Kit (Part #BKDK55418) fits the following vehicles: 1998-2003 Toyota Sienna. Always verify your specific year, make, and model before ordering.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Sienna Trailer Connector Kit (Part #BKDK55418) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Yes, the Curt 55418 T-Connector is designed for the Toyota Sienna. The manual covers installation on this vehicle model.
The kit includes double-sided tape for mounting the converter box, an eyelet, and a screw for securing the white ground wire. The T-Connector itself has green and yellow wire ends for vehicle harness connection.
You will need a Phillips head screwdriver to remove trim panel screws, a drill with a 3/32" bit for the ground wire hole, and a wrench or socket to secure the eyelet screw. A small flathead screwdriver may help separate vehicle connectors carefully.
Open the rear door and remove the rear threshold. On both the driver's and passenger sides, remove the Phillips head screw holding the plastic trim panel, then pull back the panel to expose the vehicle's wiring harness connectors.
1. On the passenger side, separate the vehicle harness connectors carefully without damaging the locking tabs. 2. Plug the T-Connector's green wire between the separated connectors until they lock. 3. Route the green wire along the threshold to the driver's side. 4. Repeat the process on the driver's side using the T-Connector end with the yellow wire.
Mount the black converter box on the driver's side on a flat surface in an out-of-the-way location using the double-sided tape provided with the kit.
Yes. You must drill a 3/32" hole to secure the white ground wire to a suitable grounding point such as the vehicle's frame or cross member. Before drilling, verify that no miscellaneous items are hidden behind or under the surface to avoid damage or personal injury.
Drill a 3/32" hole for the white ground wire eyelet.
The green wire connects to the vehicle's wiring harness on the passenger side, and the yellow wire connects on the driver's side. Both are part of the T-Connector assembly that integrates with the vehicle's existing harness.
The white wire is the ground wire. It is secured to a suitable grounding point such as the vehicle's frame or cross member using an eyelet and screw, and must be installed in a 3/32" drilled hole.
Before drilling, verify that no miscellaneous items are hidden behind or under the surface where you plan to drill. This prevents damage to hidden components and personal injury.
When separating the vehicle connectors, be careful not to damage the locking tabs. The T-Connector plugs between the separated connectors and locks into place, so the tabs must remain intact.
On the driver's side, remove the jack compartment panel and the jack assembly. Then pull back the plastic trim panel to locate the vehicle's wiring harness.
Route the green wire along the threshold from the passenger side to the driver's side. Route the 4-flat connector to the center of the vehicle. After installation, re-attach all trim panels and the threshold.
Yes, the Curt 55418 T-Connector is designed for the Toyota Sienna.
Yes, you must drill a 3/32" hole for the ground wire. Always verify that no hidden items are behind the surface before drilling.
The kit includes double-sided tape for the converter box, an eyelet, and a screw for the ground wire.
The green wire connects to the passenger side vehicle harness and the yellow wire to the driver's side. The white wire is the ground wire.
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