
Ask a Question About This Product
Our in-house experts typically reply within one business day.
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!
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 Dodge Ram 1500, 2500 and 3500 (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
3 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2002 - 2005 | Dodge Ram 1500 | Installation Time: 30-60 minutes |
| 2003 - 2005 | Dodge Ram 2500 | Installation Time: 30-60 minutes |
| 2003 - 2005 | Dodge Ram 3500 | Installation Time: 30-60 minutes |
Yes, the CURT Custom Wiring Harness, 4-Way Flat Output, Select Dodge Ram 1500, 2500, 3500 Trailer Connector Kit (Part #BKDK55504) is designed to fit the 2002-2005 Dodge Ram 1500.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Dodge Ram 1500, 2500, 3500 Trailer Connector Kit (Part #BKDK55504) fits the following vehicles: 2002-2005 Dodge Ram 1500; 2003-2005 Dodge Ram 2500; 2003-2005 Dodge Ram 3500. Always verify your specific year, make, and model before ordering.
The CURT Custom Wiring Harness, 4-Way Flat Output, Select Dodge Ram 1500, 2500, 3500 Trailer Connector Kit (Part #BKDK55504) fits 2002-2005 Dodge Ram 1500 models. The 2005 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 Dodge Ram 1500, 2500, 3500 Trailer Connector Kit (Part #BKDK55504) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Yes, Curt part number 55504 is designed for Dodge Ram 1500, Dodge Ram 2500, and Dodge Ram 3500 models. The installation uses the vehicle's existing taillight wiring harness in positions T3 and T5.
The Curt 55504 is a T-connector trailer wiring harness that taps into your vehicle's existing taillight wiring. It includes a converter box, a 4-flat connector for the trailer, and wiring with yellow and green leads for the driver and passenger sides respectively.
The kit includes a T-connector with yellow and green wires, a black converter box, a white ground wire with eyelet and screw, double-sided tape, cable ties, and a 4-flat connector. You will need a drill with a 3/32" bit if no suitable existing screw is available for grounding.
The manual does not specify whether the battery must be disconnected. Contact Curt Manufacturing or your installer for this safety requirement before beginning work.
Locate the vehicle's taillight wiring harness in positions T3 and T5 under the vehicle. The harness will have connectors similar to those on the T-connector included in the kit.
On the driver's side, separate the vehicle's taillight connectors without damaging the locking tabs. Insert the T-connector end with the yellow wire between the separated connectors, ensuring they are fully inserted with locking tabs in place. Repeat on the passenger's side using the green wire T-connector end.
Route the T-connector end with the green wire under the vehicle to the passenger's side taillight wiring harness. Avoid any location that may pinch or cut the wire during routing.
Locate a suitable grounding point near the connector, such as an existing screw with nut in the vehicle's frame. If no existing screw is available, drill a 3/32" hole and secure the white wire using the eyelet and screw provided in the kit. Before drilling, verify that no miscellaneous items are hidden behind or under the surface to avoid damage or personal injury.
Drilling is required only if no suitable existing screw with nut is available on the vehicle's frame for grounding the white wire. If drilling is necessary, use a 3/32" drill bit. Always verify that no miscellaneous items are hidden behind or under any surface before drilling to avoid damage and personal injury.
Drill a 3/32" hole if no existing screw is available on the vehicle's frame for grounding the white wire.
Adhere the black converter box to the frame of the vehicle using the double-sided tape provided in the kit.
Secure any loose parts of the T-connector with the cable ties provided in the kit.
Route the 4-flat connector to the center of the vehicle and secure it in a convenient out-of-the-way location.
Before drilling, verify that miscellaneous items are not hidden behind or under any surface. Drilling without checking can cause damage to hidden components and personal injury.
Avoid any location that may pinch or cut the wire when routing the T-connector under the vehicle. Also, do not damage the locking tabs on the vehicle's connectors when separating them.
Yes, the Curt 55504 is designed for Dodge Ram 1500, 2500, and 3500 models.
You need a drill with a 3/32" bit only if no existing screw is available on the vehicle frame for grounding. All other hardware is included.
Drilling is optional and only needed if no existing screw with nut is available on the vehicle frame for the ground wire. If drilling is required, use a 3/32" bit.
Before drilling, verify that no miscellaneous items are hidden behind or under the surface to avoid damage and personal injury.
On Sale Today
Original price was $89.95. Current price is $79.99.


Quick Ship
In stock and ready to ship — order now!
Shipping from Eau Claire, WIFREE SHIPPING
Estimated delivery Wed, Sep 9 - Fri, Sep 11
Order before 2 PM EST Monday–Friday for same-day processing
Guaranteed safe & secure checkout
No reviews have been added for this product.