Our in-house experts typically reply within one business day.
CURT
Verify Fitment
Select your vehicle to confirm this part fits.
Always the correct part
We know our products
Quality Products
Free Shipping!
Always the correct part
We know our products
Quality Products
Free Shipping!
Vehicle battery connection required
Includes fuse holder, battery connection wiring and other necessary wiring components
Includes fuse holder, battery connection wiring and other necessary wiring components
Warranty: One-Year Limited Warranty
Color: Black
Electrical System Type: 3W
Output Type: 4-Way Flat
Tail Light Circuits: 6.0 Amps
Turn and Brake Circuits: 3.0 Amps
Installation Difficulty: Professional
Installation Time Exact (Minutes): 45
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 Prius Prime (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 888-634-9494Rediscover "Us" Time | Tested. Proven. Safe. Towing Products
1 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2017 - 2022 | Toyota Prius Prime | Installation Time: 30-60 minutes |
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Prius Prime Trailer Connector Kit (Part #BKDK56371) fits 2017-2022 Toyota Prius Prime models. The 2022 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Prius Prime Trailer Connector Kit (Part #BKDK56371) is designed to fit the 2017-2022 Toyota Prius Prime.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Prius Prime Trailer Connector Kit (Part #BKDK56371) fits the following vehicles: 2017-2022 Toyota Prius Prime. Always verify your specific year, make, and model before ordering.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Toyota Prius Prime Trailer Connector Kit (Part #BKDK56371) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Yes, CURT part 56371 is designed for the Toyota Prius Prime. This is a custom wiring harness for passenger car applications. Verify your vehicle matches the application before purchasing.
The CURT 56371 is a custom wiring harness that connects your vehicle's taillight circuits to a 4-flat trailer connector. It allows you to tow a trailer with integrated lights on your Toyota Prius Prime.
You will need: ratchet, 10mm socket, flat blade screwdriver, panel trim removal tool, wire stripper, wire crimper, and cutting tool. A test light or properly wired trailer is also needed to test the harness after installation.
The harness includes: custom wiring harness with red, brown, yellow, green and black wires; a white ground wire with ring terminal; a provided screw for grounding; a converter box; double-sided tape; sealant; cable ties; and a 4-flat dust cover.
The manual provides step-by-step instructions for DIY installation. However, the installation involves accessing the vehicle's electrical system and taillight connectors. If you are not comfortable working with vehicle wiring or removing interior trim panels, professional installation is recommended.
Open the vehicle trunk and remove all trunk floor coverings. Then remove the push fasteners securing the center trunk flooring and remove both side storage trays to access the taillight wiring connectors.
Remove the rear scuff panel and side trunk liner on the driver side to locate the vehicle taillight wiring harness connectors. Separate the connectors from the taillight housing carefully, avoiding damage to the locking tabs. Insert the custom wiring harness end with red and brown wires between the separated connectors, ensuring they are fully inserted with locking tabs in place.
Locate the center trim panel on the outside of the vehicle under the rear bumper and remove its fasteners. Remove the trim panel to locate the vehicle taillight wiring harness connectors. Separate the connectors carefully, avoiding damage to the locking tabs. Insert the custom wiring harness end with yellow and green wires between the separated connectors, ensuring they are fully inserted with locking tabs in place.
You should first locate a suitable grounding point near the connector, such as an existing screw with nut in the vehicle frame. If no suitable point exists, you may drill a 3/32" pilot hole for the provided screw. The area must be free of rust, dirt and paint. Always check for hidden items behind or under surfaces before drilling to avoid damage and personal injury.
Yes. Locate the grommet behind the rear-center of the trunk pan where vehicle wiring passes through to the rear bumper rail connectors. Remove the grommet and cut a slit large enough to route the custom wiring harness through. After routing the harness, reseat the grommet and use the provided sealant to seal the cut and around all wires.
The harness has two ends: one with red and brown wires connects to the driver side taillight, one with yellow and green wires connects to the center rear bumper taillight, and a black power wire connects to the vehicle battery (routing details are on the included CME-PCL-INS sheet). A white ground wire with ring terminal grounds to the vehicle frame.
The battery connection must be fuse-protected with a 10-amp maximum fuse. Exceeding this rating can cause loss of warranty, overheating and potential fire. Do not exceed the product rating or tow vehicle lamp load rating, whichever is lower.
Signal circuits are rated at 3.0 amps per side. Tail and running circuits are rated at 6.0 amps total. Do not exceed these ratings or the tow vehicle lamp load rating, whichever is lower.
Test the wiring harness for proper function using a test light or by connecting a properly wired trailer. All steps must be followed to ensure the harness functions properly. Reinstall all items removed during installation and install the provided 4-flat dust cover to help prevent corrosion.
When in use, route the 4-flat to the center of the vehicle. When not in use, roll it up and store in a convenient, out-of-the-way location. Secure any loose wires with the provided cable ties.
Locate a flat spot inside the vehicle near the taillight and adhere the black converter box using the provided double-sided tape.
After routing the custom wiring harness through the grommet opening and reseating the grommet, use the provided sealant to seal the cut in the grommet and around all the wires to prevent water intrusion.
Yes, the CURT 56371 is designed specifically for the Toyota Prius Prime passenger car configuration.
You need: ratchet, 10mm socket, flat blade screwdriver, panel trim removal tool, wire stripper, wire crimper, and cutting tool. A test light or properly wired trailer is needed to test after installation.
Drilling may be required only if no suitable existing grounding point is available on the vehicle frame. If drilling is needed, a 3/32" pilot hole is drilled for the provided ground screw. Cutting the grommet is required.
A 10-amp maximum fuse is required. Exceeding this rating can cause loss of warranty, overheating and potential fire.
Test for proper function using a test light or by connecting a properly wired trailer to the 4-flat connector.
Signal circuits: 3.0 amps per side. Tail/running circuits: 6.0 amps total. Do not exceed these ratings or the vehicle's lamp load rating, whichever is lower.
On Sale Today
Original price was $120.95. Current price is $100.99.You save $19.96 (17%)
Free Shipping
Ships free on all orders
Authorized Dealer
Quick Ship
In stock and ready to ship — order now!
Shipping from Eau Claire, WIFREE SHIPPING
Estimated delivery Mon, Sep 7 - Wed, Sep 9
Order before 2 PM EST Monday–Friday for same-day processing
Guaranteed safe & secure checkout
Total for 4 items:
$176.94$196.90
No reviews have been added for this product.