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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®.'
Experts available to answer your questions
Call 888-634-94941 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2004 - 2010 | Toyota Sienna | Installation Time: 30-60 minutes |
Total for 4 items:
$143.91$148.90
The CURT 55580 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Toyota Sienna (Part #BKDK55580) fits the following vehicles: 2004-2010 Toyota Sienna. Always verify your specific year, make, and model before ordering.
Yes, the CURT 55580 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Toyota Sienna (Part #BKDK55580) is designed to fit the 2004-2010 Toyota Sienna.
The CURT 55580 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Toyota Sienna (Part #BKDK55580) fits 2004-2010 Toyota Sienna models. The 2010 model year is the last year covered by this part number. For newer models, check for an updated version.
The CURT 55580 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Toyota Sienna (Part #BKDK55580) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Yes, the Curt 55580 custom wiring harness is designed for Toyota Sienna vehicles. It is compatible with SUVs, mini and full-sized vans in the Sienna lineup.
The Curt 55580 has two circuit ratings: Signal Circuits are rated at 3.0 amps per side, and Tail/Running Circuits are rated at 6.0 amps total. You must not exceed these ratings or your tow vehicle's lamp load rating, whichever is lower, as exceeding the rating can cause loss of warranty, overheating and potential fire.
You will need a ratchet, 10mm socket, and a panel trim removal tool. The harness comes with a provided screw for grounding and double-sided tape for the converter box.
Remove the two bolts securing the taillight assembly, then carefully pull the taillight rearward. Repeat this process on both the driver and passenger sides. The manual does not specify the torque value for these bolts.
Follow these steps in order: (1) Remove both taillight assemblies; (2) Remove the rear threshold using three cargo bolts; (3) Pull back the driver side trim panel; (4) Open the passenger side jack storage compartment; (5) Route the yellow-wire harness end through the driver side taillight opening and insert between separated connectors; (6) Secure the white ground wire to a suitable grounding point; (7) Route the green-wire harness end to the passenger side and repeat the connector insertion; (8) Adhere the converter box inside the vehicle near the taillight using double-sided tape; (9) Reinstall all removed items and install the 4-flat dust cover.
You may need to drill a hole depending on your vehicle. First, locate a suitable grounding point near the connector, such as an existing screw with nut in the vehicle frame. If no suitable existing point is available, drill a 3/32" pilot hole for the provided screw. The area must be free of rust, dirt and paint. Before drilling, check for miscellaneous items hidden behind or under surfaces to avoid damage and personal injury.
Drill a 3/32" pilot hole for the provided ground screw. The area should be free of rust, dirt and paint before securing the white ground wire using the ring terminal.
The harness has three wire colors: yellow wire (routed to the driver side taillight), green wire (routed to the passenger side taillight), and white wire (ground wire). The harness also includes a black converter box that is adhered inside the vehicle.
Separate the connectors from the taillight housing, taking care not to damage the locking tabs. Insert the custom wiring harness end (yellow for driver side, green for passenger side) between the separated connectors. Make sure the connectors are fully inserted with locking tabs in place to ensure a secure connection.
Locate a flat spot inside the vehicle near the taillight and adhere the black converter box using the provided double-sided tape. The manual does not specify whether this adhesive is permanent or removable.
The provided 4-flat dust cover should be installed after all other components are in place. It helps prevent corrosion on the wiring harness connectors.
All steps must be followed to ensure the wiring harness functions properly. Once installed, test for proper function by using a test light or by connecting a properly wired trailer. The manual does not provide detailed testing procedures.
Exceeding the product rating (Signal Circuits 3.0 amps per side, Tail/Running Circuits 6.0 amps total) or your tow vehicle's lamp load rating, whichever is lower, can cause loss of warranty, overheating and potential fire. You must not exceed these ratings under any circumstances.
Open the vehicle's jack storage compartment on the passenger side to expose the opening to the taillight assemblies. This allows you to route and connect the green-wire harness end to the passenger side taillight.
Remove the three cargo bolts securing the rear threshold, then carefully pry the threshold away from the vehicle. The manual does not specify the torque value for these bolts.
Pull back on the driver side trim panel. Take care not to damage the alignment tabs on the back of the panel during removal.
Yes, the Curt 55580 is designed for Toyota Sienna vehicles.
Signal Circuits: 3.0 amps per side. Tail/Running Circuits: 6.0 amps total. Do not exceed these ratings or your vehicle's lamp load rating, whichever is lower.
Ratchet, 10mm socket, and panel trim removal tool. The harness includes a screw for grounding and double-sided tape for the converter box.
Drilling may be required for the ground wire. If no existing screw with nut is available in the vehicle frame, drill a 3/32" pilot hole for the provided screw.
Test for proper function using a test light or by connecting a properly wired trailer.
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