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Vehicle battery connection required
Includes fuse holder and other necessary wiring components
Includes fuse holder and other necessary wiring components
Warranty: One-Year Limited Warranty
Electrical System Type: 3W
Output Type: 4-Way Flat
Tail Light Circuits: 6.0 Amps
Turn and Brake Circuits: 3.0 Amps
Installation Difficulty: Advanced
Installation Time Exact (Minutes): 20
CURT custom wiring connectors are the easiest way to outfit your vehicle with a CURT trailer wiring connection. They are built with some of the most advanced technology in the industry, and each one is custom-fitted to work with a specific make and model. Some automotive manufacturers install a special socket on the vehicle to be used for vehicle-to-trailer wiring. Although this special socket is not equipped on every vehicle, a CURT custom wiring connector -- also called a T-connector -- utilizes the socket for simple, stress-free installation. Rather than requiring you to cut, splice and solder into your vehicle's wiring system, the custom wiring connector uses a single OEM-compatible plug and instantly provides a standard, universal vehicle-to-trailer wiring connection, typically in the form a 4-way flat. All CURT custom wiring connectors are made vehicle-specific for the easiest possible installation and the best fit. This particular plug-in connector provides a 4-way flat socket and is designed to be a custom wiring option for certain years of the Honda Odyssey (to verify your vehicle compatibility, see application info). It comes with all necessary hardware to establish a solid connection. It also comes with a dust cover to keep the connector socket clean when not in use. To ensure long-lasting reliability, all CURT custom wiring connectors are thoroughly tested for optimal functionality. Stress is the last thing you should feel when towing a trailer -- whether you're hauling your RV to that favorite camping destination, your ATVs up to the hunting grounds or your fishing boat to the new hidden hotspot. At CURT, we think your towing equipment should add to the enjoyment of your experience, not detract from it.

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 |
|---|---|---|
| 2011 - 2017 | Honda Odyssey | Installation Time: 30-60 minutes |
The CURT 56378 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Honda Odyssey (Part #BKDK56378) fits 2011-2017 Honda Odyssey models. The 2017 model year is the last year covered by this part number. For newer models, check for an updated version.
The CURT 56378 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Honda Odyssey (Part #BKDK56378) fits the following vehicles: 2011-2017 Honda Odyssey. Always verify your specific year, make, and model before ordering.
Yes, the CURT 56378 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Honda Odyssey (Part #BKDK56378) is designed to fit the 2011-2017 Honda Odyssey.
The CURT 56378 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Honda Odyssey (Part #BKDK56378) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Yes, the Curt 56378 is designed for Honda Odyssey vehicles in the SUVs, Mini & Full-Sized Vans category. The connector installs behind the driver side rear access panel. Verify your vehicle matches the application before purchasing.
The connector is rated for Signal Circuits at 3.0 amps per side and Tail/Running Circuits at 6.0 amps total. The battery connection must be fuse-protected with a 10-amp maximum fuse. Do not exceed the product rating 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 flat blade screwdriver and a panel trim removal tool. The manual also references drilling a 3/32" pilot hole for the ground screw if a suitable existing screw is not available, which would require a 3/32" drill bit.
The kit includes a 10-amp fuse for the in-line fuse holder, a 10-amp mini fuse for position #8 in the rear fuse panel, two 7.5-amp fuses for positions #2 and #11, a ground screw with ring terminal, double-sided tape for mounting the converter box, cable ties for securing loose wires, and a 4-flat dust cover.
The custom wiring connector plugs into the vehicle connector located at the rear fuse panel behind the driver side rear access panel. Route the connector behind the interior panel from the rear of the vehicle to the fuse panel, then insert it fully into the vehicle connector, ensuring the locking tabs are in place.
Mount the black converter box on a flat spot inside the vehicle near the taillight using the provided double-sided tape. The box should be positioned conveniently for access to the in-line fuse holder where you will insert the 10-amp fuse.
Locate a suitable grounding point near the connector, such as an existing screw with nut in the vehicle frame. If no suitable point exists, drill a 3/32" pilot hole. Clean the area of rust, dirt and paint, then secure the white ground wire using the ring terminal and provided screw. Before drilling, check for hidden items behind or under any surface to avoid damage and personal injury.
Drilling is required only if a suitable existing grounding point (such as an existing screw with nut in the vehicle frame) is not available. If drilling is necessary, you will drill a 3/32" pilot hole for the provided ground screw. Before drilling, check for hidden items behind or under any surface to avoid damage and personal injury.
Drill a 3/32" pilot hole for the provided ground screw. The grounding point should be free of rust, dirt and paint. Before drilling, check for hidden items behind or under any surface to avoid damage and personal injury.
Install a 10-amp mini fuse in position #8, and two 7.5-amp fuses in positions #2 and #11 in the rear fuse panel. Additionally, insert a 10-amp fuse into the in-line fuse holder on the converter box. The battery connection must be fuse-protected with a 10-amp maximum fuse.
When in use, route the 4-flat to the center of the vehicle and out of the trunk. When not in use, roll it up and store in a convenient, out-of-the-way location inside the trunk. Secure any loose wires with the provided cable ties. Install the provided 4-flat dust cover to help prevent corrosion.
Test for proper function by using a test light or connecting a properly wired trailer. All steps must be followed to ensure the wiring connector functions properly before testing.
Exceeding the product rating can cause loss of warranty, overheating and potential fire. Do not exceed 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. The battery connection must be fuse-protected with a 10-amp maximum fuse.
Before drilling to create a grounding point, check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury.
Yes, the Curt 56378 is designed for Honda Odyssey vehicles. The connector installs behind the driver side rear access panel.
You need a flat blade screwdriver, panel trim removal tool, and a 3/32" drill bit (if drilling a ground hole). All other hardware is included.
The battery connection must be fuse-protected with a 10-amp maximum fuse. Do not exceed this rating or your vehicle's lamp load rating, whichever is lower.
Install a 10-amp fuse in the in-line fuse holder, a 10-amp mini fuse in position #8, and two 7.5-amp fuses in positions #2 and #11 of the rear fuse panel.
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