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Best Trailer Wiring 101

CURT 58140 Trailer-Side 7-Pin RV Blade Wiring Harness Connector

  • EASY GRIP. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of this trailer plug. It features two hooks on either side of the plug for a better grip when plugging in or unplugging trailer wiring.
  • WEATHER-RESISTANT. This trailer wiring plug comes with concealed wire terminals. This helps protect the splice-in connection points for the wires, keeping them safe from dirt, rain, corrosion and other threats.
  • RELIABLE CONNECTION. This 7-pin trailer wiring plug comes ready to splice into your existing trailer wiring. It can be used to connect the taillights, brake lights, reverse lights, turn signals, trailer brakes and auxiliary power.
  • VERSATILE DESIGN. This connector makes a great replacement 7-way RV blade connector and is interchangeable with virtually any trailer-side 7-way RV connector. 7-pin trailer wiring is commonly used for towing RV travel trailers.
  • DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of this 7-pin trailer wiring plug is made from durable black plastic that will never rust or corrode.
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CURT 58141 Trailer-Side 7-Pin RV Blade Wiring Harness Connector

  • EASY GRIP. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of this trailer plug. It features two hooks on either side of the plug for a better grip when plugging in or unplugging trailer wiring.
  • WEATHER-RESISTANT. This trailer wiring plug comes with concealed wire terminals. This helps protect the splice-in connection points for the wires, keeping them safe from dirt, rain, corrosion and other threats.
  • RELIABLE CONNECTION. This 7-pin trailer wiring plug comes ready to splice into your existing trailer wiring. It can be used to connect the taillights, brake lights, reverse lights, turn signals, trailer brakes and auxiliary power.
  • VERSATILE DESIGN. This connector makes a great replacement 7-way RV blade connector and is interchangeable with virtually any trailer-side 7-way RV connector. 7-pin trailer wiring is commonly used for towing RV travel trailers.
  • DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of this 7-pin trailer wiring plug is made from durable black plastic that will never rust or corrode.
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CURT 58180 Trailer-Side 7-Pin Round Wiring Harness Socket with Spring

  • CONVENIENT ATTACHMENT. This 7-pin trailer wiring connector features an extension spring that allows you to attach the plug in a convenient location on your trailer and keep it accessible for plugging in any time.
  • EASY GRIP. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of this trailer wiring plug. It features tabs on the sides for a better grip when plugging into the vehicle or unplugging.
  • VERSATILE DESIGN. This trailer wiring connector makes a great replacement 7-way wiring plug. It connects the taillights, brake lights, turn signals, reverse lights, electric trailer brakes and an auxiliary power wire.
  • RELIABLE CONNECTION. This 7-way round trailer wiring plug is equipped with a locking tab on top that secures the plug into the socket when inserted. This helps maintain a reliable wiring connection in spite of bumps and vibrations while towing.
  • WEATHER-RESISTANT. To help protect the splice-in wiring connections, this die-cast metal 7-wire trailer plug features concealed terminals, keeping the wires from direct exposure to rain, dirt, road salt and other corrosive threats (wires not included).
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CURT 58080 Trailer-Side 6-Pin Round Wiring Harness Plug

  • EASY GRIP. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of this trailer wiring plug. It features tabs on the sides for a better grip when plugging into the vehicle or unplugging.
  • VERSATILE DESIGN. This trailer wiring connector makes a great replacement 6-way wiring plug. It matches industry-standard 6-way round connectors and connects the taillights, brake lights, turn signals, electric trailer brakes and an auxiliary power wire.
  • DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of this 6-pin trailer wiring connector is made from strong, durable die-cast metal.
  • RELIABLE CONNECTION. This 6-way round trailer wiring plug is equipped with a locking tab on top that secures the plug into the socket when inserted. This helps maintain a reliable wiring connection in spite of bumps and vibrations while towing.
  • WEATHER-RESISTANT. To help protect the splice-in wiring connections, this 6-wire trailer plug features concealed terminals, keeping the wires from direct exposure to rain, dirt, road salt and other corrosive threats (wires not included).
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CURT 58030 Trailer-Side 4-Pin Flat Wiring Harness with 12-Inch Wires

  • EASY GRIP. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of this trailer plug. It features tabs on the top and bottom for a better grip when plugging into your vehicle or unplugging.
  • RELIABLE CONNECTION. This 4-pin trailer wiring plug comes ready to splice into your existing trailer wiring. It has 16-gauge wires and can be used to connect the taillights, brake lights and turn signals.
  • VERSATILE DESIGN. This trailer connector makes a great replacement 4-flat trailer wiring connector. The 4-pin wiring design matches industry-standard 4-way flat sockets and can be used on a wide variety of trailers.
  • DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of this 4-pin trailer wiring plug is made from durable black molded rubber that will never rust or corrode.
  • READY TO INSTALL. Equipped with blunt-cut, color-coded wires, this 4-prong trailer wiring plug comes ready to install. The 12-inch wire lead provides extra length for an easy installation.
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CURT 58145 Heavy-Duty Trailer-Side 7-Pin RV Blade Wiring Harness Connector Black

  • EASY GRIP. Plugging in your trailer wiring and trailer lights is comfortable and easy with the ergonomic design of this heavy-duty trailer plug. It features a handle-shaped body for a solid grip when plugging in or unplugging trailer wiring.
  • WEATHER-RESISTANT. This trailer wiring plug comes with concealed wire terminals. This helps protect the splice-in connection points for the wires, keeping them safe from dirt, rain, corrosion and other threats.
  • RELIABLE CONNECTION. This heavy-duty 7-pin trailer wiring plug comes ready to splice into your existing trailer wiring. It can be used to connect the taillights, brake lights, reverse lights, turn signals, trailer brakes and auxiliary power.
  • VERSATILE DESIGN. This connector makes a great upgrade or replacement 7-way RV blade connector and is interchangeable with virtually any trailer-side 7-way RV connector. 7-pin trailer wiring is commonly used for towing RV travel trailers.
  • DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of this heavy-duty 7-pin trailer wiring plug is made from durable black plast....
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CURT 58348 Trailer-Side 4-Pin Flat Wiring Harness with 48-Inch Wires

  • EASY GRIP. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of this trailer plug. It features tabs on the top and bottom for a better grip when plugging into your vehicle or unplugging.
  • RELIABLE CONNECTION. This 4-pin trailer wiring plug comes ready to splice into your existing trailer wiring. It has 16-gauge wires and can be used to connect the taillights, brake lights and turn signals.
  • VERSATILE DESIGN. This trailer connector makes a great replacement 4-flat trailer wiring connector. The 4-pin wiring design matches industry-standard 4-way flat sockets and can be used on a wide variety of trailers.
  • DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of this 4-pin trailer wiring plug is made from durable black molded rubber that will never rust or corrode.
  • READY TO INSTALL. Equipped with blunt-cut, color-coded wires and four snap locks, this 4-prong trailer wiring plug comes ready to install. The 48-inch wire lead provides plenty of extra length for a flexible installation.
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CURT 58082 Trailer-Side 6-Pin Round Wiring Harness Plug with Spring

  • CONVENIENT ATTACHMENT. This 6-pin trailer wiring connector features an extension spring that allows you to attach the plug in a convenient location on your trailer and keep it accessible for plugging in any time.
  • EASY GRIP. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of this trailer wiring plug. It features tabs on the sides for a better grip when plugging into the vehicle or unplugging.
  • VERSATILE DESIGN. This trailer wiring connector makes a great replacement 6-way wiring plug. It matches industry-standard 6-way round connectors and is commonly used for towing horse trailers, farm trailers, boat trailers and utility trailers.
  • RELIABLE CONNECTION. This 6-way round trailer wiring plug is equipped with a locking tab on top that secures the plug into the socket when inserted. This helps maintain a reliable wiring connection in spite of bumps and vibrations while towing.
  • WEATHER-RESISTANT. To help protect the splice-in wiring connections, this die-cast metal 6-wire trailer plug features concealed terminals, keeping the wires from direct exposure to rain, dirt, road salt and other corrosive threats (wires not included).
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CURT 58092 Vehicle-Side and Trailer-Side 6-Pin Round Wiring Harness Connectors

  • EASY GRIP. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of these trailer wiring connectors. The trailer plug features tabs on the sides for a better grip when plugging into the vehicle socket or unplugging.
  • VERSATILE DESIGN. These connectors make great replacement 6-way wiring plugs and sockets. They connect the taillights, brake lights, turn signals, electric trailer brakes and an auxiliary power wire.
  • DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of these 6-pin trailer wiring connectors is made from strong, durable die-cast metal.
  • RELIABLE CONNECTION. These 6-way round trailer wiring connectors are equipped with locking tabs that secure the plug into the socket when inserted. This helps maintain a reliable wiring connection in spite of bumps and vibrations while towing.
  • WEATHER-RESISTANT. To help protect the splice-in wiring connections, these 6-wire trailer plugs feature concealed terminals, keeping the wires from direct exposure to rain, dirt, road salt and other corrosive threats (wires not included).
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CURT 58380 Vehicle-Side and Trailer-Side 4-Pin Flat Wiring Harness with 12-Inch Wires

  • EASY GRIP. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of these vehicle-trailer connectors. They feature tabs on the top and bottom for a better grip when plugging in or unplugging.
  • RELIABLE CONNECTION. These 4-pin trailer wiring plugs come ready to splice into your existing vehicle and trailer wiring. They have 16-gauge wires and can be used to connect the taillights, brake lights and turn signals.
  • VERSATILE DESIGN. These vehicle-trailer connectors make great replacement 4-flat wiring plugs and sockets. The 4-pin wiring design matches industry-standard 4-way flat connectors and is compatible with a wide variety of trailers.
  • DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of these 4-pin trailer wiring plugs is made from durable black molded rubber that will never rust or corrode.
  • READY TO INSTALL. Equipped with color-coded wires, these 4-prong trailer wiring connectors come ready to install. The 12-inch wire loop provides extra length for an easy installation.
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CURT 58050 Vehicle-Side and Trailer-Side 4-Pin Flat Wiring Harness with 72-Inch Wires

  • EASY GRIP. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of these vehicle-trailer connectors. They feature tabs on the top and bottom for a better grip when plugging in or unplugging.
  • RELIABLE CONNECTION. These 4-pin trailer wiring plugs come ready to splice into your existing vehicle and trailer wiring. They have 16-gauge wires and can be used to connect the taillights, brake lights and turn signals.
  • VERSATILE DESIGN. These vehicle-trailer connectors make great replacement 4-flat wiring plugs and sockets. The 4-pin wiring design matches industry-standard 4-way flat connectors and is compatible with a wide variety of trailers.
  • DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of these 4-pin trailer wiring plugs is made from durable black molded rubber that will never rust or corrode.
  • READY TO INSTALL. Equipped with color-coded wires, these 4-prong trailer wiring connectors come ready to install. The 72-inch wire loop provides plenty of extra length for a flexible installation.
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CURT 58090 Vehicle-Side 6-Pin Round Trailer Wiring Harness Socket

  • SPRING-LOADED COVER. To promote long-lasting use and weather resistance, this round 6-pin trailer wiring socket comes with a spring-loaded dust cover. It protects the 6-way connector when not in use, shielding it from the outdoor elements.
  • VERSATILE DESIGN. This vehicle-trailer wiring connector makes a great replacement 6-way wiring socket. It connects the taillights, brake lights, turn signals, electric trailer brakes and an auxiliary power wire.
  • DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of this 4-pin trailer wiring connector is made from strong, durable die-cast metal.
  • RELIABLE CONNECTION. This 6-way round trailer wiring socket is equipped with a locking tab on the inside of the dust cover that secures the plug in place when inserted. This helps maintain a reliable wiring connection.
  • WEATHER-RESISTANT. To help protect the splice-in wiring connections, this 6-wire vehicle socket features concealed terminals, keeping the wires from direct exposure to rain, dirt, road salt and other corrosive threats (wires not included).
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CURT 58071 Vehicle-Side 4-Pin Round Trailer Wiring Harness Socket

  • SPRING-LOADED COVER. To promote long-lasting use and weather resistance, this round 4-pin trailer wiring socket comes with a spring-loaded dust cover.....
  • VERSATILE DESIGN. This vehicle-trailer wiring connector makes a great replacement 4-flat wiring socket. It matches industry-standard 4-way round....
  • DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of this 4-pin trailer wiring connector is made from strong, durable....
  • RELIABLE CONNECTION. This 4-way round trailer wiring socket is equipped with a locking tab on the inside of the dust cover that secures the plug in....
  • WEATHER-RESISTANT. To help protect the splice-in wiring connections, this 4-wire vehicle socket features concealed terminals, keeping the wires from....
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