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The Best Inline Trailer Cords to Upgrade Your Towing Setup

American Motors Review Team
Written By American Motors Review Team
Last updated: Mar 7, 2025, 11:21 AM
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best inline trailer cords in 2024

An inline trailer cord is an engineering gadget that bridges the critical gap between your trailer and vehicle, transmitting vital electrical signals for functions such as brake lights and turn signals. The inline trailer cord is a key player, integral to both safe travels and legal adherence. The Gear it Inine Trailer code comes out on top, due to its many amazing features. In this guide, we will show you how to harness the power of dependable connectivity. We’ll also be exploring the features to consider in your quest for the perfect inline trailer cord, ensuring your safety and peace of mind on the road.

View all Contents
  • Choosing the Best Inline Trailer Cord: A Buying Guide
    • Cord Length
    • Gauge Size
    • Wire Configuration
    • Durability
    • Connector Type
    • Voltage Rating
  • People Also Asked
  • Why Trust Us?
  • Contributors
  • Related Reads

Our Top Picks for the Best Inline Trailer Cords of 2025

  • GearIT Inline Trailer Cord: Best Overall (Shop Now) →
    Read more about this ↓
  • MICTUNING Plug Inline Trailer Cord: Most Organized (Shop Now) →
    Read more about this ↓
  • Nilight Heavy Duty Trailer Cord: Best Longevity (Shop Now) →
    Read more about this ↓
  • RVGUARD Inline Trailer Cord Kit: Best for DIY Assembly (Shop Now) →
    Read more about this ↓
  • Kohree Inline Trailer Cord: Most Durable (Shop Now) →
    Read more about this ↓

GearIT Inline Trailer Cord

Best Overall
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The GearIT Inline Trailer Cord effortlessly tackles all your RV trailer and camper wiring needs. With a generous length of eight feet, the cord spoils you in flexibility and reach. The cord, optimally encapsulated in a weatherproof harness, becomes a reliable companion in diverse weather conditions. Housed within a waterproof junction box, offers a sturdy defense against water damage.

Boasting seven gang junctions, the GearIT cord ensures the best quality for wire and terminal connections. The cord maintains reliability and durability, providing an uninterrupted power supply even in harsh conditions. More than just a power cord, the GearIT is a pathway to a smooth and hassle-free camping or RV trip. It is branded the overall best due to its stellar rating, high-quality wires, and ease of installation.

Product Pros
  • Quality product at a good price
  • Allows for additional accessories
  • Heavy duty and sturdy construction
Product Cons
  • Wiring needs adjustment 
Key features/specs
7-way color-coded wiring system
Made with pure copper connectors
Ideal for RV trailers and campers
Eight feet PVC extension cord

MICTUNING Plug Inline Trailer Cord

Most Organized
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The MICTUNING Plug Inline Trailer Cord presents itself as a superior choice for your trailer wiring needs. This inline trailer cord, designed from high-quality heavy-duty material, equips your trailer with unrivaled durability and enhanced weatherproofing capabilities. It excels in providing consistent and reliable performance, ensuring your trailer wiring is always at its best.

Accompanied by a 7 Gang Junction Box, it streamlines your wiring tasks while offering an impressive length of eight feet. This added length guarantees versatility and convenience, allowing for easy connections regardless of your trailer’s size or model. This inline trailer cord doesn’t just resist wear and tear; it actively fights against it, providing you with a long-lasting solution for your trailer wiring. With its robust and durable design, it’s not just a cord; it’s peace of mind for your trailer.

Product Pros
  • High-quality, heavy-duty construction
  • Easy to install with clear instructions
  • Versatile and robust wiring options
Product Cons
  • Box is not as sturdy
Key features/specs
Seven-way copper blade in a heavy-duty plug
Flameproof ABS junction box construction
Eight-foot long cord 
Four open and four close rubber grommets

Nilight Heavy Duty Trailer Cord

Best Longevity
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The Nilight Heavy Duty Trailer Cord promises ease of installation and user-friendly functionality, making it a standout product for those looking to upgrade their trailer wire harness kit. This product breaks down complexities with its color-coded functional marks, guiding you effortlessly through the wiring process for turn lights, brake signal lamps, reverse lights, and more. It’s a versatile choice, catering not only to RVs, but also trailers, campers, caravans, food vans, and other towed vehicles.

Exemplifying durability and longevity, the inline trailer cord is a hefty eight feet long, providing a perfect replacement for any factory short cord. The cord’s design is not only practical but also weather-proof and corrosion-resistant, thanks to the main cable being molded into the plug. This ensures a sturdy seal, shielding it from any harsh weather conditions.

Product Pros
  • Easy to install and use
  • Water and corrosion resistant
  • Affordable and great value
Product Cons
  • The ground post requires extra wiring
Key features/specs
Seven-way copper blade molded plug
Eight feet long with PVC housing
Weatherproof and corrosion-resistant
Seven colour-coded wires

RVGUARD Inline Trailer Cord Kit

Best for DIY Assembly
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The RVGUARD Inline Trailer Cord Kit allows you to revamp your do-it-yourself trailer project with its complete easy installation kit. This high-quality inline trailer cord ensures a safe and efficient connection. It arrives equipped with a seven-gang junction box kit, a 12-volt breakaway switch, and a plug holder, all of which contribute to its seamless installation process. The waterproof junction box further shields the wiring harness, actively warding off any potential water damage.

This inline trailer cord specifically caters to the need for a swift and effortless overhaul of your trailer’s wiring system. Its design simplicity aids you in navigating the setup process, reducing the time spent on installation and troubleshooting. The inclusion of a trailer connector cable wiring harness further bolsters its performance, ensuring a reliable and steady connection.

Product Pros
  • High-quality and durable product
  • Easy installation with clear instructions
  • Complete kit with all necessary items
Product Cons
  • May have to verify the wiring
Key features/specs
Seven-way copper blade plug
Seven color-coded wires for easy wiring
Rubber-like insulation on wires
Constructed with conductive copper wire
Soft and rugged PVC housing

Kohree Inline Trailer Cord

Most Durable
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The Kohree Inline Trailer Cord proves to be a reliable, heavy-duty choice for most wiring needs, impressively designed to endure any weather condition. This wiring harness kit makes installation incredibly swift and straightforward, even for those without prior experience. One of its standout features includes a double prongs trailer connector cable, designed to firmly secure your RV, truck, or camper.

Created for durability, this inline trailer cord showcases robust construction that won’t easily succumb to wear and tear. It commits to outlasting the elements, boasting a weatherproof feature that safeguards it against heavy rain or scorching heat. This trait makes it an ideal pick for those who often find themselves in various environmental conditions. To top it off, it is reasonably priced, making it a cost-effective solution for those seeking excellent quality at an affordable rate.

Product Pros
  • Compatible with different trailers
  • Easy to install and remove
  • Durable and long cable
Product Cons
  • Color coding system may be confusing
Key features/specs
The plug is made of brass
Seven color-coded wires 
Adapts conductive copper wire

Choosing the Best Inline Trailer Cord: A Buying Guide

When it comes to ensuring the safety, efficiency, and functionality of your trailer, nothing is as important as choosing the right inline trailer cord. This vital component is needed to transmit electrical power from your towing vehicle to your trailer, enabling everything from the brake lights to the onboard functioning systems. And if you’re unsure about which one to get, finding the perfect inline trailer cord is a breeze with this guide. Here is all the information you need to make sure you’re well-equipped to make an informed decision.

Cord Length

The cord length is an essential factor to ponder before making a purchase. It’s important to ensure that the cord provides sufficient reach between your trailer and your towing vehicle without being excessively long. A cord that’s too short may disconnect under tension, while an overly long cord could drag on the ground and potentially suffer damage. Therefore, measure the distance between your towing vehicle and trailer beforehand to get the right size.

Gauge Size

Don’t disregard gauge size. Gauge size refers to the thickness of the inner wires that transmit power. A lower gauge number signifies a thicker wire, which can carry more electrical current without overheating. For heavy-duty trailers with plenty of electrical appliances, you’ll need a cord with a lower gauge number. For smaller trailers with minimal appliances, a higher gauge number will suffice.

Wire Configuration

Another crucial feature to check is the wire configuration, as this determines the number of electrical functions the cord supports. In general, trailer cords come in configurations ranging from four-way to seven-way. The more ways, the more functions the cord can handle, including tail lights, brake lights, turn signals, electric brakes, and accessory power. Choose a configuration that aligns with your trailer’s power requirements.

Durability

Inline trailer cords endure a lot, from being exposed to harsh weather conditions to being jerked, pulled, and bent. Thus, durability is a must. Look for cords that boast a sturdy construction, with features such as weatherproof and corrosion-resistant coatings. A cord that resists abrasion will stand the test of time and offer you a safer, more reliable connection.

Connector Type

Inline trailer cords typically come with one of two connector types: plugs or sockets. Plugs, also known as male connectors, fit into sockets (female connectors). The connector type you need depends on the existing outlets on your towing vehicle and trailer. To avoid compatibility issues, ensure that the trailer cord you choose matches your vehicle’s connector type.

Voltage Rating

Lastly, pay attention to the voltage rating. This determines the maximum amount of power that the cord can handle. For most trailers, a cord with a 12-volt rating is sufficient. However, if your trailer has a large number of electrical systems or uses high-power appliances, you may need a cord with a higher voltage rating.

People Also Asked

How do I install a trailer cord?

To install it, you would need to connect the cord between the tow vehicle and the trailer. This usually involves connecting the color-coded wires of the cord to the corresponding wires on the vehicle and trailer. It's always recommended to refer to the vehicle and trailer manuals or consult with a professional to ensure proper installation.

What is the standard length of an inline trailer cord?

Inline trailer cords come in various lengths to suit different needs. The most common lengths range from four feet to 25 feet. However, it's crucial to select a cord length that provides enough slack for turns without dragging on the ground.

Can I use an inline trailer cord for a boat trailer?

Yes, you can use an inline trailer cord for a boat trailer. However, it is important to ensure that the cord is designed for marine use or is at least resistant to corrosion from saltwater and other harsh weather conditions.

Is it safe to leave my inline trailer cord connected all the time?

While it's safe to leave it connected, it's not recommended as it can potentially drain the tow vehicle's battery if the trailer's electrical system is drawing power when the vehicle's engine is not running.

Can I use an extension with my inline trailer cord?

An extension can be used with a trailer cord if the existing cord does not reach the tow vehicle's electrical outlet. However, it is important to ensure that the extension is rated for the same voltage and amperage as the trailer cord to avoid potential electrical issues.

Can I replace the connector on my inline trailer cord?

Yes, the connectors can be replaced if they become damaged or corroded. However, it's important to ensure that the replacement connector is compatible with both the trailer and tow vehicle's electrical systems.

Contributors

American Motors Review Team
American Motors Review Team
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