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Includes harness, 4-flat extension, mounting bracket and hardware
Includes harness, 4-flat extension, mounting bracket and hardware
Warranty: One-Year Limited Warranty
Installation Difficulty: Novice
Installation Time Exact (Minutes): 60
Towing your vehicle behind your RV is a great way to experience more of the adventure on your cross-country excursions. Whether you're towing a compact car or a full-size truck, CURT has the perfect solution to help you Bring It! CURT towed-vehicle RV harnesses are a vehicle-specific, plug-and-play solution to wiring your vehicle for dinghy towing. They use original-equipment-compatible connectors to plug into your vehicle's wiring system without any cutting, splicing or soldering required. They provide a standard 4-way flat connector to plug into the RV socket and synchronize the vehicle's tail lights, turn signals and brake lights with the RV's. Because each towed-vehicle RV harness has a vehicle-specific design, installation is fast and easy. This particular RV dinghy towing wiring harness is designed for specific years of the Ram 2500 and 3500. CURT RV harnesses are also built to provide long-lasting operation. They feature integrated block diodes that protect the vehicle's circuits from the RV signals. They isolate the sensitive vehicle electronics, keeping them from overheating and short circuiting. Every CURT towed-vehicle RV harness comes ready to install with all necessary hardware included. They also come with a 4-way flat extension to provide plenty of length to plug into the RV socket, as well as a connector mounting bracket to mount the connector on the vehicle.

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
The CURT 58995 Custom Towed-Vehicle RV Wiring Harness for Dinghy Towing, Fits Select Ram 2500, 3500 (Part #BKDK58995) fits the following vehicles: 2019-2024 Ram 2500; 2019-2024 Ram 3500. Always verify your specific year, make, and model before ordering.
Yes, the CURT 58995 Custom Towed-Vehicle RV Wiring Harness for Dinghy Towing, Fits Select Ram 2500, 3500 (Part #BKDK58995) is designed to fit the 2019-2024 Ram 2500.
The CURT 58995 Custom Towed-Vehicle RV Wiring Harness for Dinghy Towing, Fits Select Ram 2500, 3500 (Part #BKDK58995) fits 2019-2024 Ram 2500 models. The 2024 model year is the last year covered by this part number. For newer models, check for an updated version.
The CURT 58995 Custom Towed-Vehicle RV Wiring Harness for Dinghy Towing, Fits Select Ram 2500, 3500 (Part #BKDK58995) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
The manual confirms the 58995 is designed for trucks with factory taillights and rear bumper configuration as shown in the wiring location guide. Diesel trucks and some gas trucks with winter packages have two batteries, which the installation accounts for. For specific vehicle year, make, and model compatibility, consult the manufacturer or fitment database, as the manual does not list individual vehicle applications.
You will need: ratchet, socket extension, panel trim removal tool, fishwire (or substitute such as a cut-up wire hanger, stiff wire, rope or string), T-25 Torx bit, and a cutting tool. You will also need zip ties, an abrasive pad or paper to clean the ground point, and a 3/32" drill bit if you need to drill a ground hole.
Yes. Step 1 requires you to locate the vehicle battery and disconnect the negative battery terminal before beginning installation. Fasten the disconnected wire down and away from the battery while completing the installation. If the battery was disconnected, reconnect the negative terminal after all other steps are complete.
Drilling is optional. Step 5 requires you to locate a grounding point, which can be an existing screw or bolt in the vehicle frame. If no suitable existing fastener is available, you may drill a 3/32" pilot hole. Before drilling, check for hidden items behind or under any surface to avoid damage and personal injury.
The 4-flat is the trailer connector that routes from the driver side of the vehicle through the engine compartment. It is mounted in the front of the vehicle under the hood and connects to any vehicle with functioning trailer lights to verify harness operation. A provided dust cover should be installed to help prevent corrosion.
The manual states: do not exceed the product rating or tow vehicle lamp load rating, whichever is lower. The specific product load rating is not provided in the manual. Contact the manufacturer for the exact rating.
The Curt 58995 is an RV harness (trailer wiring harness) that allows you to connect a trailer to your truck. It integrates with your truck's factory taillights and rear bumper to provide trailer lighting control. Once installed, you can attach a 4-flat connector to any vehicle with functioning trailer lights, and the taillights on both the tow vehicle and trailer will function together.
The manual shows a hardware photo and indicates the product includes a custom wiring harness with yellow and green wires, a white ground wire with ring terminal, a 4-flat connector, a ground screw, a 4-flat dust cover, and zip ties for securing the harness.
Yes. The manual specifically notes that diesel trucks (and some gas trucks with winter packages) will have two factory batteries. The installation process accounts for this configuration, so the 58995 is compatible with diesel trucks.
Lower the tailgate and use a T-25 Torx bit to remove the taillight fasteners on both sides of the vehicle. Remove each taillight by pulling straight back out of the vehicle. Separate the upper connectors carefully, taking care not to damage the locking tabs. Set the taillights aside. Repeat this process on the other side.
Fishwiring is a method to push or pull an electrical wire through a blind hole. Insert a fishwire (which can be a cut-up wire hanger, stiff wire, rope or string) through the blind hole and locate it on the other side. Use tape to secure the harness to the fishwire and pull back up. If the fishwire or harness gets hung up, push back down, wiggle it around, or twist the wire to loosen it. Make sure the fishwire is long enough to stick out on the other side before inserting it.
On the driver side of the vehicle, route the yellow wire up from the bottom to the taillight cavity using a fishwire. Install the custom wiring harness with the yellow wire positioned between the factory harness. This allows the custom harness to integrate with the factory taillight wiring.
Run the harness with the green wire along the rear bumper to the passenger side. Loosely secure it with zip ties, leaving room for adjustments. Then repeat the fishwiring process on the passenger side, installing the harness into the factory wiring. After adjusting the harness as needed, tighten the zip ties down so the harness is firmly in place.
Locate a grounding point such as an existing screw or bolt in the vehicle frame. The area should be free from rust, dirt, and paint; use an abrasive pad or paper to remove rust and paint if needed. Secure the white ground wire with the ring terminal on the existing fastener, or drill a 3/32" pilot hole and use the provided ground screw. Before drilling, check for hidden items behind or under any surface to avoid damage and personal injury.
On the driver side, route the 4-flat along the top of the frame rail up to the rear of the front tire and loosely secure with zip ties. Once the harness is just behind the driver-side front wheel, route it to the rear of the driver-side wheel well. Using a fishwire, route the harness down along the inner fender and firewall. From under the vehicle, pull back the inside of the wheel well lining and inner fender. Once the wire is at the bottom of the panel, pull the harness up to the engine compartment. Finally, route the 4-flat along the driver-side inner fender and mount it in the front of the vehicle under the hood.
Secure any excess wire so that it is not drooping or dangling, but not so tight that it causes unnecessary strain to the wire, which could lead to breakage over time. After removing slack from the 4-flat wire, tighten any zip ties and add as needed. Use a zip tie to fasten any excess wire to a solid spot along the driver-side inner fender.
Once the RV harness is installed, verify that it is functioning by attaching the 4-flat to any vehicle with functioning trailer lights. The taillights on the tow vehicle should function along with the taillights on the towing vehicle. If they do not, check all connections and wiring before using the harness.
Periodic inspection of all wires and connections should be performed to ensure there is no visible damage or loose connections. Install the provided 4-flat dust cover to help prevent corrosion.
Do not lay tools across the positive (+) terminal of the battery, as this can cause a ground short, causing sparks and other electrical shocks. Before drilling, check for hidden items behind or under any surfaces to avoid damage and personal injury. Do not secure wires so tightly that they cause strain and breakage. Disconnect the negative battery terminal before beginning installation and fasten it down and away from the battery.
Do not exceed the product rating or tow vehicle lamp load rating, whichever is lower. The specific product load rating is not provided in the manual; contact the manufacturer for the exact rating to ensure safe operation.
If the fishwire or harness gets hung up on something during routing, push back down, wiggle it around, or twist the wire to loosen it from what it is hung up on. Ensure the fishwire is long enough to stick out on the other side before inserting it. If it remains stuck, carefully retrace the route and check for obstructions.
Verify that the harness is functioning by attaching the 4-flat to any vehicle with functioning trailer lights. The taillights on the tow vehicle should function along with the taillights on the towing vehicle. If they do not, check all wiring connections, ensure the yellow and green wires are properly integrated with the factory harness, verify the white ground wire is securely fastened to a clean ground point, and confirm the negative battery terminal is reconnected.
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