Part of towing responsibly is making sure your trailer lights are working properly. Whether you have just installed a new custom wiring harness or are trying to locate the cause of an electrical problem, Curt connector testers are great for testing tail lights, turn signals, brake lights, ground connections and other electrical components on your vehicle. A connector tester works by plugging into the connector socket on your vehicle and responding to the various electrical signals produced by pushing the brake pedal, signaling a turn, turning on the running lights and so on. When the socket is getting proper power, the tester's various LEDs will light up corresponding to each wire in the connector. Testing your vehicle-side socket is essential after installing a new custom vehicle to trailer wiring harness and is highly recommended every time you hitch up to tow. Also, if you are experiencing electrical problems with your trailer, a Curt tester will be able to tell you whether the problem is rooted in your vehicle's electrical system or if your trailer needs some rewiring. All Curt connector testers come with LED lights to be bright and long-lasting. This particular electrical tester fits a four way flat socket and comes with quality plastic construction.

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.

Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your trailer's electrical functions are, you need a solid connection to keep the power flowing and ensure safety on the road. Curt electrical connectors are designed and manufactured to give you a reliable connection every time you plug in your trailer. This four way flat connector is designed to supply power for tail lights, turn signals and brake lights, as well as a ground connection. It features durable rubber molded construction and is made with 12 in of standard color coded, bonded loop wire to easily splice into your vehicle's wiring system. It includes both a vehicle end and trailer end and can be cut to splice into existing wiring or left as a loop to serve as a useful extension harness. It is compatible with all two wire vehicle systems.

Part of towing responsibly is making sure your trailer lights are working properly. Whether you have just installed a new custom wiring harness or are trying to locate the cause of an electrical problem, Curt connector testers are great for testing tail lights, turn signals, brake lights, ground connections and other electrical components on your vehicle. A connector tester works by plugging into the connector socket on your vehicle and responding to the various electrical signals produced by pushing the brake pedal, signaling a turn, turning on the running lights and so on. When the socket is getting proper power, the tester's various LEDs will light up corresponding to each wire in the connector. Testing your vehicle side socket is essential after installing a new custom vehicle-to-trailer wiring harness and is highly recommended every time you hitch up to tow. Also, if you are experiencing electrical problems with your trailer, a curt tester will be able to tell you whether the problem is rooted in your vehicle's electrical system or if your trailer needs some rewiring. All Curt connector testers come with LED lights to be bright and long-lasting. Wire testers are available for 4-way flat, 5-way flat, 6-way round and 7-way RV blade connectors. This particular electrical tester fits a 7-way RV blade socket and comes with quality plastic construction.

Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your trailer's electrical functions are, you need a solid connection to keep the power flowing and ensure safety on the road. Curt electrical connectors are designed and manufactured to give you a reliable connection every time you plug in your trailer. This seven way round RV blade connector is designed to supply power for tail lights, turn signals, electric trailer brakes, a 12 V battery, reverse lights and brake lights, as well as a ground connection. It features rust-free black plastic construction and comes with a spring loaded cover to keep out dust and water. This seven way round connector is a female end socket, specifically designed for the vehicle side of the connection. Seven way RV blades are typically used on RV travel trailers and this particular connector can be easily interchanges with other seven way RV connectors.

Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your trailer's electrical functions are, you need a solid connection to keep the power flowing and ensure safety on the road. Curt electrical connectors are designed and manufactured to give you a reliable connection every time you plug in your trailer. This seven-way round RV blade connector is designed to supply power for tail lights, turn signals, electric trailer brakes, a 12 V battery, reverse lights and brake lights, as well as a ground connection. It features rust-free black plastic construction and is a male end plug, specifically designed for the trailer side of the connection. Seven-way RV blades are typically used on RV travel trailers and this particular connector can be easily interchanged with other seven-way RV connectors.

Like trailer hitches and ball-mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your trailer's electrical functions are, you need a solid connection to keep the power flowing and ensure safety on the road. Curt electrical connectors are designed and manufactured to give you a reliable connection every time you plug in your trailer. This four-way flat connector is designed to supply power for tail lights, turn signals and brake lights, as well as a ground connection. It features durable rubber-molded construction and is made with 72 in of standard color-coded, bonded loop wire to easily splice into your vehicle's wiring system. It includes both a vehicle end and trailer end and can be cut to splice into existing wiring or left as a loop to serve as a useful extension harness. It is compatible with all two-wire vehicle systems.

Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your trailer's electrical functions are, you need a solid connection to keep the power flowing and ensure safety on the road. Curt electrical connectors are designed and manufactured to give you a reliable connection every time you plug in your trailer. This four way flat connector is designed to supply power for tail lights, turn signals and brake lights, as well as a ground connection. It features durable rubber molded construction and is made with 60 in of standard color coded, bonded wire to easily splice into your vehicle's wiring system. This four way flat connector is a female end socket, specifically designed for the car side of the connection. It is compatible with all two wire vehicle systems.

Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your trailer's electrical functions are, you need a solid connection to keep the power flowing and ensure safety on the road. Curt electrical connectors are designed and manufactured to give you a reliable connection every time you plug in your trailer. This four-way flat connector is designed to supply power for tail lights, turn signals and brake lights, as well as a ground connection. It features durable rubber-molded construction and is made with 12 in of standard color-coded, bonded wire to easily splice into your trailer's wiring system. This four-way flat connector is a male-end plug, specifically designed for the trailer side of the connection. It is compatible with all two-wire vehicle systems.

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 six way round socket, but your trailer may have a four 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 four way flat, four way round, five way flat, six way round, seven way RV blades and more. This electrical adapter is designed to adapt a seven way RV blade vehicle socket to fit a six way round trailer plug (center pin for brake lights). It features quality plastic construction and requires no splicing. All Curt wiring and electrical products come with a 1 year limited warranty to give you the assurance you need to tow with confidence.

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.

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 ideal 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 7-way RV blade vehicle socket to fit a 4-way flat trailer plug. It features quality plastic construction, requires no splicing and comes with an LED connector tester dust cover. Not only does this dust cover protect the socket from dirt, water and road grime, but it also allows you to test your vehicle side wiring connector to ensure your electrical systems are functioning properly. All Curt wiring and electrical products come with a one year limited warranty to give you the assurance you need to tow with confidence.

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 six-way round socket, but your trailer may have a four-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 four-way flat, four-way round, 5-way flat, six-way round, seven-way RV blades and more. This electrical adapter is designed to adapt a seven-way RV blade vehicle socket to fit a four-way flat trailer plug. It features quality plastic construction and requires no splicing. All Curt wiring and electrical products come with a 1 year limited warranty to give you the assurance you need to tow with confidence.

A curt connector provides a reliable connection for your trailer wiring, using an industry-standard format, such as a 4-way flat, 6-way round or 7-way RV blade. They can be used to install new wiring on a vehicle or trailer or as replacement connectors for existing wiring. This particular connector is designed to be a ideal OEM replacement, providing a 4-way flat socket and 7-way RV blade socket to accept either trailer plug type. It features a USCAR base to connect to a standard USCAR plug (see application info to verify fitment with your vehicle). Once plugged into the USCAR socket, it provides a connection for the taillights, turn signals, brake lights, backup or reverse lights, electric trailer brakes and a 12 V battery. It also provides a connection for the ground wire. This trailer wiring connector is built to withstand the elements. It is constructed from durable black molded plastic to be impervious to rust, and it features spring-loaded dust caps to keep out rain, salt, grime and dirt when the connectors are not in use.

For any and all-types of trailers with electric trailer brakes, a Curt breakaway kit provides you with the equipment you need to be prepared. We offers three different complete breakaway systems to accommodate various trailer sizes and meet your specific towing needs. All of our breakaway kits are tested for your safety and meet DOT requirements for holding and breakaway situations. This breakaway switch offers reliable activation of your trailer brakes, featuring silver contact points for a solid connection and a nylon case to protect against the elements. It is designed for use with the Curt Soft-Trac 1 and Soft-Trac 2-breakaway kits and features a high-temp wieldable tab for convenient mounting. Nobody hitches up a trailer expecting a breakaway, but that doesn't mean you should tow unprepared. Be ready for anything with a Curt breakaway kit.

Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your trailer's electrical functions are, you need a solid connection to keep the power flowing and ensure safety on the road. Curt electrical connectors are designed and manufactured to give you a reliable connection every time you plug in your trailer. This four-way flat connector is designed to supply power for tail lights, turn signals and brake lights, as well as a ground connection. It features durable rubber-molded construction and is made with 48 in of standard color-coded, bonded wire to easily splice into your trailer's wiring system. This four-way flat connector is a male-end plug, specifically designed for the trailer side of the connection. It is compatible with all two-wire vehicle systems.

Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your trailer's electrical functions are, you need a solid connection to keep the power flowing and ensure safety on the road. Curt electrical connectors are designed and manufactured to give you a reliable connection every time you plug in your trailer. This two-way flat wiring connector is designed to supply power to an extra electrical component on an automotive vehicle, motorcycle, boat, ATV and more. It can be used as disconnect or to wire in any number of electrical accessories such as a fan, an extra light, audio equipment or a battery. It features durable rubber-molded construction and is made with 12 in of color-coded, bonded loop wire. The wires can be cut to splice into existing wiring or left as a loop to function as a useful extension harness.

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 six way round socket, but your trailer may have a four 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 four way flat, four way round, five way flat, six way round, seven way RV blades and more. This electrical adapter is designed to adapt a seven way RV blade vehicle socket to fit a six way round trailer plug (center pin for auxiliary power). It features quality plastic construction and requires no splicing. All Curt wiring and electrical products come with a 1 year limited warranty to give you the assurance you need to tow with confidence.

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 six way round socket, but your trailer may have a four 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 four way flat, four way round, five way flat, six way round, seven way RV blades and more. This electrical adapter is designed to adapt a four way flat vehicle socket to fit a six way round trailer plug. It features strong die cast metal construction and requires some splicing. All Curt wiring and electrical products come with a 1 year limited warranty to give you the assurance you need to tow with confidence.

There is nothing like the luxury and power that go along with heavy-duty towing. Fifth wheel RV's offer a deluxe, home away from home experience unlike any other, while gooseneck trailers possess a strength that far surpasses most other trailer options. As with any trailer, however, fifth wheels and goosenecks must be equipped with the proper lighting and electrical systems and tend to require even more complex connectors than a standard receiver type trailer setup. Make things simple with a Curt fifth wheel or gooseneck extension harness. These wiring harnesses are designed to put an extra connector socket in the bed of your pickup truck while still retaining power to the rear connector socket mounted on your bumper. This is done by plugging into the back of the existing original equipment (OEM) harness and routing through the body of the truck to a hole in the truck bed, providing a connector that is ready to accommodate your fifth wheel or gooseneck trailer. This Curt extension harness is designed to work with seven way RV blade connectors and comes in a length of 7 ft. When you need a towing electrical solution that allows you to switch back and forth between your receiver hitch and specialized trailer hitch, Curt gets you plugged in.

A Curt custom wiring connector (sometimes called a T-connector) is a simple, plug and play electrical device that eliminates the need for cutting, splicing and soldering when installing vehicle to trailer wiring. Most vehicles do not come ready to tow. Unless your vehicle has a towing package, it is probably not equipped with a trailer wiring connector. This is where Curt's custom wiring connectors come into play. A custom wiring connector uses a single original equipment plug to plug into a special socket provided by your vehicle. Though this option is not available on every vehicle, some automotive manufacturers design their vehicles to be easily equipped for towing by supplying a socket, integrated into the vehicle's electrical system, to readily accept a custom wiring connector. With a Curt custom wiring connector, there is no need to tap into the taillight assembly because a special socket is already provided. This special custom wiring connector actually provides two connector sockets for a multipurpose option. It plugs into an OEM USCAR connector and offers a four-way flat and six-way round connector (see application info to verify fitment with your vehicle). It also comes with a mounting bracket for easy installation. Curt custom wiring connectors are designed to be long-lasting and simple to install. They come with dust covers to keep your connector clean when not in use.

Weatherproof plastic body, 12 in color-coded wires. Corrosion resistant terminals, meets SAE standards.

Weatherproof plastic body. Color-coded wires. Includes a 12 in car end and a 12 in trailer end. Corrosion resistant terminals, meets SAE standards.

Basic connector, 4 wire flat vehicle end, 48 in color coded wires. Printed wire functions for color blind and color fading. Corrosion resistant terminals, meets SAE standards.

Die-cast zinc connectors. 4-pole round matched set. Impact- and corrosion-resistant.

Electronic tail light converter adapts tow vehicle tail light system to the trailer system. Double molded weatherproof design, corrosion-resistant terminals, includes dust cover. Powers up to 2.1 A per output. Use on vehicles with amber or independent bulb turn signals.

For maintaining or re-wiring a trailer. Wishbone design, allows two brown wires to be run to each taillight. Corrosion resistant terminals. 20 ft trailer end Y-harness.

Includes three splice connectors. Corrosion resistant terminals, meets SAE standards.

Oversized hinge for maximum durability. Reinforced easy-grip lid opens 180 deg for easier connections. Good corrosion resistance. Internal seals for ultimate weatherproofing. Includes powder coated mounting bracket, hex-head zinc-plated screws and hardware and grease packets.

Impact- and corrosion-resistant. Rear grommet for weatherproofing, with strain relief.

Converts 6-way connectors with round terminals to standard 4-way flat connectors. Easy-pull grip design, impact and corrosion-resistant. Includes dust cover.

Corrosion-resistant terminals. Rear grommet for weatherproofing, with strain relief.

Matched set, plastic socket and die-cast zinc metal plug, mounting bracket, wire, splices and hardware. Impact- and corrosion-resistant.

Adapts a 7 RV blade to both 6-pole round and 4 wire flat, with universal center pin auxiliary. Center pin can be switched to auxiliary or electric brake. Impact- and corrosion-resistant, includes dust cover.

Vehicle side connector 48 in, trailer side connector 18 in, for use with marine type trailers equipped with surge brakes. Added reverse function for easy backing maneuvers. Corrosion resistant terminals.

Fully digital settings with braking power from 5 to 99%. Easy plus-minus power buttons. Plug-in connection cuts installation time by hours and allows for quick removal. Vertical slide for ease of use. Mounts at any angle. Short proof protected. 4-brake capacity.

Weatherproof plastic body. Color coded wires. Includes a 48 in car end and a 12 in trailer end. Corrosion resistant terminals, meets SAE standards.

Plug with three 48 in wires and one 12 in ground wire.

Flat extension, 2-pole, 12 in color coded wires. Waterproof molded plastic body. Corrosion resistant terminals.

Converts 7-way connectors with RV blade type terminals to standard 4-wire flat connector. Ergonomic, easy-pull grip design, impact and corrosion-resistant. Includes dust cover.

Pre-wired adapter, flexible wire, enhanced weatherproofing. Impact and corrosion resistant.

Replaces damaged 4-wire flat. No external splices. Matched set for vehicle and trailer. Corrosion resistant terminals.

Ergonomic pistol grip, easier to connect and disconnect. Tin-plated terminals and rear grommet seal for increased durability and weatherproofing. Trailer side mounting bracket and grease packet included.

Vehicle side connector, 4-wire flat, 48 in color-coded wires. LED Verifies vehicle side wiring is correct. Easy pull grip design, corrosion resistant terminals. Ring terminal on ground wire.

Adapts 7 RV blade to 6-pole round, with universal center pin auxiliary, center pin can be switched to auxiliary or electric brake. Easy-pull grip, impact and corrosion-resistant, includes dust cover.

Extends wiring system for more flexibility. Corrosion resistant terminals, meets SAE standards. Includes printed wire functions.

PM Trailer Connector, Vehicle End: 4-Way Flat

Converts 7-way connectors with RV blade type terminals to standard 4-wire flat connector. Ergonomic, easy-pull grip design, impact and corrosion-resistant. Includes dust cover.

Adapts four-wire flat to 7 RV blade. Pre-wired adapter, flexible wire, enhanced weatherproofing. Impact and corrosion-resistant.

Converts 6-way connectors with round terminals to standard 4-way flat connectors. Easy-pull grip design, impact and corrosion-resistant. Includes dust cover.

Plug, trailer end, 6-pole round. Die-cast zinc for durability. Impact- and corrosion-resistant.

Metal socket, vehicle end, die-cast zinc for durability, impact and corrosion resistance.

Weatherproof, adapts a 4-wire flat to both a 4-wire flat and a 7 RV blade. Impact- and corrosion-resistant, includes dust cover, mounting bracket and hardware.

Plastic plug, trailer end. Impact- and corrosion-resistant. Rear grommet, strain relief.

Adapts a 7 RV blade to both a 5-wire flat and 4-wire flat. Impact and corrosion resistant, includes dust covers.