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Trailer Wiring

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Trailer Connectors
$6.09 - $139.99

Wiring Adapters
$4.94 - $89.55

Wiring Extensions
$3.87 - $235.65
Trailer Wiring Parts or Accessories

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etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector

(325 reviews)

Code: e99011

Our Price: $54.21

In Stock

Trailer Wiring
Trailer Connectors
Trailer End Connector
7 Blade
Plug and Lead
etrailer

This kit includes a junction box so you can quickly and easily connect the wires from the included trailer connector to your trailer's wiring.

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etrailer 7-Way RV Style Connector with Molded Cable - Trailer End - 6' Long - RV Standard

(77 reviews)

Code: e99010

Our Price: $25.53

In Stock

Trailer Wiring
Trailer Connectors
Trailer End Connector
7 Blade
Plug and Lead
etrailer

Replaces your damaged 7-way, RV-style, trailer-end connector. Durable cable covering insulates and protects wires from the elements. Wiring codes are RV standard.

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Hopkins 7-Way RV Style Connector with Molded Cable - Trailer End - 8' Long - RV Standard

(907 reviews)

Code: H20046

Retail: $52.29

Our Price: $46.90

In Stock

Trailer Wiring
Trailer Connectors
Trailer End Connector
7 Blade
Plug and Lead
Hopkins

Replace your damaged 7-way, RV-style, trailer-end connector with this molded cable. Durable cable covering resists damage. Wiring codes are RV standard.

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Curt Trailer Connector Adapter - 4-Way to 7-Way RV and 4-Way Flat

(454 reviews)

Code: C57672

Retail: $54.95

Our Price: $41.09

In Stock

Trailer Wiring
Wiring Adapters
Universal Fit
4 Flat to 4 Flat
4 Flat to 7 Blade
Plug and Lead
CURT

This multi-function, vehicle-end connector converts any 4-way flat, vehicle-end plug to a combination 7-way outlet and 4-pole flat outlet.

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Hopkins 7-Way Blade Style Connector with Molded Cable - Trailer End - 8' Long - Auto Standard

(75 reviews)

Code: HM20041

Our Price: $84.95

In Stock

Trailer Wiring
Trailer Connectors
Trailer End Connector
7 Blade
Plug and Lead
Hopkins

Replace your damaged 7-way, blade-style, trailer-end connector with this molded cable. Durable cable covering resists damage. Wiring codes are auto-industry standard.

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7-Pole Blade to 5-Pole Flat Connector Wired Trailer Adapter - Coiled Cable - 94-1/2" Long

(228 reviews)

Code: A57CCB

Retail: $76.48

Our Price: $55.83

In Stock

Trailer Wiring
Wiring Adapters
Universal Fit
7 Blade to 5 Flat
Plug and Lead
Optronics

Trailer adapter converts a tow vehicle's 7-pole wiring connection to a 5-pole flat pin connection for towing trailers with hydraulic brakes. Coiled cord stretches and contracts for extra flexibility. Threaded bracket ensures a secure connection.

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Bargman 7-Way, RV-Style Connector w/ 6' Long Coiled Cable - Trailer End

(141 reviews)

Code: WG54006-043

Retail: $73.55

Our Price: $56.29

In Stock

Trailer Wiring
Trailer Connectors
Trailer End Connector
7 Blade
Plug and Lead
Bargman

This molded, 7-way, RV-style, trailer-end connector allows you to connect your trailer to your vehicle. Coiled cord extends to 6' and then contracts conveniently for storage.

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Flint Hill Goods Connector Adapter - 7Way RV to 4Way Flat - 36" Cord

(72 reviews)

Code: FHG56ZR

Our Price: $13.74

In Stock

Trailer Wiring
Wiring Adapters
Universal Fit
7 Blade to 4 Flat
Plug and Lead
Flint Hill Goods

This adapter lets you span 3' to connect your 7-way, RV-style, vehicle-end connector to the 4-way flat connector on your trailer. Coiled cord ensures that wires won't drag on the ground. Molded construction is durable and corrosion resistant.

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Hopkins 7-Way Molded Trailer Wire Connector - 11' Long

(174 reviews)

Code: HM20048

Retail: $78.39

Our Price: $57.90

In Stock

Trailer Wiring
Trailer Connectors
Trailer End Connector
7 Blade
Plug and Lead
Hopkins

This molded, 7-way, RV-style, trailer-end connector lets you replace a damaged wiring harness on your trailer.

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7-Way Round RV Style Trailer Connector - Trailer Side

(359 reviews)

Code: A7WCB

Our Price: $14.42

In Stock

Trailer Wiring
Trailer Connectors
Trailer End Connector
7 Blade
Plug Only
Optronics

7-Way round plug lets you connect your trailer to the 7-way round blade connector of your tow vehicle. Interlock system keeps connections in place. Over-sized finger grips for secure disconnections. Durable ABS plastic housing.

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TorkLift Wiring Harness Extension for 48" SuperTruss or Cannon Hitch Extender - 7-Way RV

(85 reviews)

Code: TLW6048

Our Price: $130.90

In Stock

Trailer Wiring
Wiring Extensions
Universal Fit
7 Blade
Plug and Lead
TorkLift

Designed for use with your 48" long SuperTruss or Cannon receiver extension, one end of this no-splice wiring harness plugs into your truck's 7-way blade trailer connector. The other end runs back 57" to clear your bed-mounted camper.

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7-Way Molded Trailer End with 6' Cable - HD Blue Insulated

(49 reviews)

Code: 54006-009

Our Price: $57.11

In Stock

Trailer Wiring
Trailer Connectors
Trailer End Connector
7 Blade
Plug and Lead
Bargman

More Information >

7-Way Molded Trailer Wire Connector, 6' Long

(378 reviews)

Code: H20044

Retail: $65.42

Our Price: $45.78

In Stock

Trailer Wiring
Trailer Connectors
Trailer End Connector
7 Blade
Plug and Lead
Hopkins

More Information >

Curt Universal Installation Kit for Trailer Brake Controller - 7-Way RV - 10 Gauge

(64 reviews)

Code: C57186

Retail: $124.95

Our Price: $79.48

In Stock

Trailer Wiring
Wiring Adapters
Universal Fit
4 Flat to 7 Blade
Plug and Lead
CURT

This universal wiring kit lets you install an electric brake controller (sold separately) in your vehicle and a 7-way connector for your trailer lights at the same time. Plugs into the existing 4-way on your vehicle.

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Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way RV - Vehicle End

(164 reviews)

Code: 20142

Our Price: $31.93

In Stock

Trailer Wiring
Wiring Adapters
Universal Fit
7 Blade to 7 Blade
Plug Only
Tow Ready

Designed for use with vehicles that have lamp-out sensors, this adapter ensures that your trailer with LED lights does not trigger any warnings or hyperflashing when hooked up to your vehicle's 7-way, blade-style connector.

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Hopkins Plug-In Trailer Connector Adapter - 4-Way Flat to 7-Blade

(25 reviews)

Code: HM54RV

Retail: $42.11

Our Price: $27.39

In Stock

Trailer Wiring
Wiring Adapters
Universal Fit
4 Flat to 7 Blade
Plug and Lead
Hopkins

Borrowing a trailer with a 7-way plug but only have a 4-way on your vehicle? Get the light functions you need to be legal with this plug-in 4-way to 7-way adapter. Does not give you the electric brake or auxiliary power functions of a 7-way.

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Pollak Trailer Connector Adapter - Vehicle End - 7-Pole Round to 7-Way Blade

(177 reviews)

Code: PK12-724

Retail: $54.00

Our Price: $29.08

In Stock

Trailer Wiring
Wiring Adapters
Universal Fit
7 Round to 7 Blade
Plug and Lead
Pollak

This adapter plugs into your vehicle's 7-way, round-pin receptacle to adapt it for use with a trailer-end, 7-way, RV-style plug. The 7-way flat receptacle includes a hinged cover to keep dirt and moisture out of the connection.

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7-Way Molded Trailer Wire Connector, 4' Long

(368 reviews)

Code: H20043

Retail: $60.39

Our Price: $40.14

In Stock

Trailer Wiring
Trailer Connectors
Trailer End Connector
7 Blade
Plug and Lead
Hopkins

More Information >

Buyers Products Trailer Connector Adapter - 4-Way to 7-Way RV and 4-Way Flat

(159 reviews)

Code: 337TC1474P

Retail: $42.16

Our Price: $19.04

In Stock

Trailer Wiring
Wiring Adapters
Universal Fit
4 Flat to 4 Flat
4 Flat to 7 Blade
Plug and Lead
Buyers Products

This multi-function, vehicle-end connector converts any 4-way flat, vehicle-end plug to a combination 7-way outlet and 4-pole flat outlet.

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7-Way Molded Connector w/ 18' Cable - Trailer End

(28 reviews)

Code: 50-67-106

Retail: $123.35

Our Price: $91.62

In Stock

Trailer Wiring
Trailer Connectors
Trailer End Connector
7 Blade
Plug and Lead
Bargman

Prewired 7-way trailer end sealed connector with 18' of 7-way cable.

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on Trailer Wiring

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for Trailer Wiring

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for Trailer Wiring

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7-Way Molded Connector w/ 10' Cable - Trailer End

(95 reviews)

Code: 50-67-005

Retail: $75.37

Our Price: $63.86

In Stock

Trailer Wiring
Trailer Connectors
Trailer End Connector
7 Blade
Plug and Lead
Bargman

More Information >

Pollak 7 Pole to 4 Way Connector Adapter

(1010 reviews)

Code: PK12716

Retail: $20.74

Our Price: $9.01

In Stock

Trailer Wiring
Wiring Adapters
Universal Fit
7 Blade to 4 Flat
Plug Only
Pollak

Quickly and easily convert a 7-pole, RV-style connector to a 4-way, flat connector with this RV connector adapter. Adapter has a non-corrosive nylon shell.

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TorkLift Wiring Harness Extension for 42" SuperTruss or Cannon Hitch Extender - 7-Way RV

(36 reviews)

Code: TLW6042

Retail: $151.12

Our Price: $130.90

In Stock

Trailer Wiring
Wiring Extensions
Universal Fit
7 Blade
Plug and Lead
TorkLift

Designed for use with your 42" long SuperTruss or Cannon receiver extension, one end of this no-splice wiring harness plugs into your truck's 7-way blade trailer connector. The other end runs back 48" to clear your bed-mounted camper.

More Information >

Pollak 4-Way Flat Trailer Connector with 24" Harness

(3 reviews)

Code: PK64KR

Our Price: $7.68

In Stock

Trailer Wiring
Trailer Connectors
Trailer End Connector
4 Flat
Plug and Lead
Pollak

Extend your trailer wiring with this 24" 4-way flat harness, built with a molded, weather-resistant plug for durability. Color-coded 18-gauge wires make installation easy, while the polarized connection ensures a secure, proper fit.

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trailer connectors

wiring adapters

4 flat

trailer end connector

plug and lead

Trailer Wiring: Connect with Confidence

Trailer wiring is essential for ensuring your trailer's lights and brakes function properly. Whether you're rewiring a boat trailer or setting up a new RV connection, choosing the right wiring kit can make installation a breeze. Consider compatibility with your vehicle, ease of installation, and durability in various weather conditions.

Selecting the right kit depends on your vehicle's existing wiring setup and the type of trailer you have. For vehicles not prewired, a complete kit with connectors and adapters is ideal. Ensure compatibility with your trailer's lighting and brake systems, and consider kits with easy-to-follow instructions or video guides for a smoother installation.

Installation can be tricky if your vehicle isn't prewired, requiring connections under the hood and dash. Some kits may have mounting issues or require additional tools like heat shrink connectors. It's crucial to follow instructions carefully and use dielectric grease to protect connections from moisture and corrosion.

Durability is key, especially in harsh weather. Use dielectric grease on connections to prevent corrosion, and consider heat shrink connectors for added protection. Regularly inspect the wiring for wear and tear, and ensure all connections are secure to prevent separation or damage.

If the wiring doesn't fit, you may need an adapter or converter, especially if your vehicle and trailer have different plug types. Check the specifications of both your vehicle and trailer to ensure compatibility, and consider purchasing a universal adapter for flexibility.

Using quality components ensures reliable performance and longevity. Inferior parts can lead to connection failures, shorts, or corrosion, especially in challenging environments like saltwater exposure. Investing in high-quality wiring and connectors can save time and money in the long run.