CURT Electrical Adapter (6-Way Round Vehicle to 4-Way Flat Trailer) Trailer Wiring Adapter ConnectorCURT$19.99In Stock
View productAsk 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
Always the correct part
We know our products
Quality Products
Free Shipping!
Always the correct part
We know our products
Quality Products
Free Shipping!
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 Thu, Sep 17 - Sat, Sep 19
Order before 2 PM EST Monday–Friday for same-day processing
Guaranteed safe & secure checkout
Some manual wiring required
Warranty: One-Year Limited Warranty
Installation Time Exact (Minutes): 0
There are several different types of connectors used to supply power from a tow vehicle's electrical system to a trailer's wiring system. Some trailers only need the bare essentials -- running lights, brake lights and turn signals -- while others require a connection for reverse lights, electric brakes and auxiliary power. With connectors ranging from simple to complex, it may be the case that the connection between your vehicle and your trailer is not a perfect match. For example, your truck may be equipped with a 6-way round socket, but your trailer may have a 4-way flat plug. For this very common problem, CURT offers a quick and simple solution in the form of an electrical adapter. An adapter is an electrical device that allows a connection to be made between a mismatched trailer plug and vehicle socket. It easily plugs in your vehicle's electrical socket and usually requires no additional wiring. CURT offers an array of adapters to accommodate most types of plugs and sockets, including 4-way flat, 4-way round, 5-way flat, 6-way round, 7-way RV blades and more. This electrical adapter is designed to adapt a 4-way flat vehicle socket to fit a 6-way round trailer plug. It features strong diecast metal construction and requires some splicing. All CURT wiring and electrical products come with a one-year limited warranty to give you the assurance you need to tow with confidence.
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
Yes. Your vehicle must be equipped with a 4-way flat trailer connector to use these adapters. If your vehicle does not have a 4-way flat connector, you will need to install a custom wiring harness or other 4-way flat trailer connector before installing the adapter.
Both convert a 4-way flat connector to a 6-way round connector. Part 57183 does not include a mounting bracket, while part 57185 includes a mounting bracket.
Single output adapters (such as 57183, 57184, 57185, 57626, 57676) convert the vehicle's 4-way flat connector to one trailer connector type: either 6-way round or 7-way RV blade. Dual output adapters (57604, 57624, 57672, 57674, 57102) provide two trailer connector outputs simultaneously: a 4-way flat and either a 6-way round or 7-way RV blade.
No. The adapter requires a vehicle 4-way flat connector to function. If your vehicle is not equipped with one, you must first install a custom wiring harness or other 4-way flat trailer connector before proceeding with the adapter installation.
You will need: 1/8" drill bit, drill, Phillips screwdriver, wire stripper, cutting tool, terminal crimpers, and test light. Three #10 - 1/2" self-tapping screws are also required but not included with the product.
No. Three #10 - 1/2" self-tapping screws are required but not included. You must supply these separately.
Mount the combination harness on the vehicle's bumper or other suitable surface. The mounting location must be within reach of the trailer's wiring harness and positioned near the center of the vehicle. If a mounting bracket is included with your adapter, use it as a template for drilling.
Drill 1/8" holes into the mounting surface using the bracket as a template. These holes are used to secure the bracket with #10 - 1/2" self-tapping screws.
Drill a 1/8" hole at a suitable grounding point within reach of the combination harness. The area must be clean of dirt, debris and undercoating before drilling.
Use 12 gauge (minimum) wire with butt connectors to connect the remaining wires to the appropriate functions.
The white wire is the ground (-) connection. It must be attached with a ring terminal to a 1/8" hole drilled in a suitable grounding point on the vehicle using a #10 - 1/2" self-tapping screw. This ground connection is required for the harness to work properly. The white wire on the vehicle's 4-way flat connector will not support the ground functions of the adapter's 4-way flat and 6- or 7-way connector.
The yellow wire connects to auxiliary or back-up lights.
The blue wire connects to electric brakes.
The black wire is the positive power (+) connection and must be connected with an appropriate inline fuse.
Failing to properly ground the product can cause loss of warranty, overheating and potential fire. The white wire must be securely attached to a clean grounding point on the vehicle frame using a #10 - 1/2" self-tapping screw.
No. Never attach the mounting bracket directly to the hitch by cutting, welding or drilling into the hitch. Mount it to the vehicle's bumper or other suitable surface instead.
Before drilling, be sure of what is behind the surface you are going to drill. Stay clear of brake lines, fuel lines, wiring or any other components that may harm the vehicle's operation. Check for miscellaneous items that may be hidden behind or under any surface to avoid damage and personal injury.
Confirm proper function with a test light or by using a properly functioning trailer. Secure any loose wires by using cable ties or equivalent product.
Feed the entire harness through the large mounting hole in the bracket and position the connector against the face of the mounting bracket. Using the supplied mounting hardware, attach the connector to the bracket.
Slide the 4-way flat connector into the side mounting slot until the connector is secured in place.
Plug the combination harness's trailer-style 4-way flat connector into the tow vehicle's 4-way flat connector. This connection provides the tail lights, stop lights and turn signal functions.
No. Part 57183 converts 4-way flat to 6-way round without a mounting bracket. Part 57185 is the same conversion but includes a bracket.
You need three #10 - 1/2" self-tapping screws (not included). These secure the mounting bracket and ground wire connection.
Yes. You must drill two 1/8" holes: one for the mounting bracket and one for the ground wire connection. Check for brake lines, fuel lines and wiring before drilling.
Use 12 gauge (minimum) wire with butt connectors for all wire connections.
Yes. The white ground wire must be attached to a clean grounding point on the vehicle frame. Failing to properly ground the product can cause loss of warranty, overheating and potential fire.
No. Never attach the mounting bracket directly to the hitch by cutting, welding or drilling. Mount it to the vehicle's bumper or other suitable surface.
| Part # | From Vehicle | To Trailer | Notes | Material |
|---|---|---|---|---|
| Single Output | ||||
| 57184 | 4-way flat | 7-way RV blade | See mounting brackets on pages 127 and 128 | Plastic |
| 57183 | 4-way flat | 6-way round | See mounting brackets on pages 127 and 128 | Die-cast |
| 57185 | 4-way flat | 7-way RV blade | Includes mounting bracket | Steel |
| 57186 | 4-way flat | 7-way RV blade | Includes wiring and components to splice in a brake controller connection | Plastic |
| 57506 | 4-way flat | 7-way RV blade | Ideal for towing a boat trailer with surge brakes | Plastic |
| 57626 | 4-way flat | 6-way round | Integrated test lamps display proper connections | Plastic |
| 57676 | 4-way flat | 7-way RV blade | Integrated test lamps display proper connections | Plastic |
| 56476 | 4-way flat | USCAR socket | Pair with #57015 for 4-way and 7-way RV blade output. See page 112 | Plastic |
| Dual Output | ||||
| 57604 | 4-way flat | 4-way flat | -- | Plastic |
| 57624 | 4-way flat | 6-way round | Integrated test lamps display proper connections | Plastic |
| 57627 | 4-way flat | 6-way round | -- | Plastic |
| 57674 | 4-way flat | 7-way RV blade | Integrated test lamps display proper connections | Plastic |
| 57102 | 4-way flat | 7-way RV blade | Audible back-up alarm when vehicle in reverse (97 decibels) | Plastic |
No reviews have been added for this product.