Your Guide to 4-Pin Trailer Connectors


Searching for the right trailer wiring can be tiresome. There are many industry standards that don’t lend themselves useful to the layman. Every standard is there for a reason, so don’t go wiring your trailer without the proper guidance. Each of these trailer 4-pin connectors comes with unique wiring diagrams. It can be a real pain to have failing wiring in your trailer. This can lead to dysfunctional brake lights, turn signals, and more when you start to notice these classic signs. It’s time to replace your trailer wiring harness.

How you wire up your trailer depends largely on your needs. Every load needs brake lights, tail lights, and turn signal capability. Other trailers have electrically driven brakes. These brakes use electricity to actuate electric brakes or disable hydraulic brakes when in reverse. Some trailers may need running lights or side markers.

Installing a 4-pin connector to your trailer is a simple project you can complete in an afternoon. You’ll need a 4-pin wiring kit that’s 20 ft or more in length. Most trailers use 16 gauge wire, but you should check with your trailer’s manufacturer to ensure you use compatible wire.

1. Shoreline Marine 4-Way Trailer Wire Harness

Keeping your trailer in a full-functioning condition is important. If you’re looking for a reliable wire harness, the Shoreline Marine 4-way Wire Harness is exactly what you need. This manufacturer specializes in boat, and marine vehicle wiring harnesses. They are known for their durability in wet conditions and consistency on the road.

This 4-pin connector features a saltwater trailer wiring harness with a 25 ft wishbone design. This design maximizes coverage and compatibility. It uses a 4 ft side connector to enhance the trailer’s handling. These features ensure a proper connection between truck and trailer.

The harness uses conveniently color-coded wires and frame clips for ease of installation. The clips come in handy when wiring the trailer as they allow you to separate each wire, which reduces confusion. They can also be clamped tightly for a quick and snug assembly.

Shoreline Marine 4-Way Trailer Wire Harness (25-Feet)

Shoreline Marine
amazon.com

2. CURT 4-Pin Flat Wiring Harness

CURT’s 4-pin Flat wiring harness is one of the highest quality trailer connectors on the market today. Its ergonomic design creates an easy grip, and the wiring kit allows for seamless LED additions. It comes with two tabs for quick installation.

This wiring harness guarantees dependable connectivity with a durable black molded rubber corrosion-free casing. Its 4-pin plug means this harness can connect to most standard trailer wires. Its 16 gauge wire is perfect for attaching to brake lights, turn signals, and tail lights. This versatile product makes a perfect switch for your old wiring harness.

CURT 58030 Trailer-Side 4-Pin Flat Wiring Harness with 12-Inch Wires

3. Hopkins Towing Solutions Flat Trailer Harness

It’s time to get that trailer wiring connector that best fits your needs. This 30 ft long wiring harness allows you to cover your trailer extensively. Whether for routine maintenance or a complete re-wiring, the Hopkins Towing Solutions Flat Trailer Harness is the ideal choice for any trailer.

This product uses a wishbone shape for more comprehensive uses and weighs 4.8 ounces. The wiring harness comes with two long brown wires for connecting both trailer taillights and side-runners. You won’t have to worry about weather damage with this harness. Its terminals are completely rustproof.

The Flat Trailer Harness is surprisingly convenient to install and use. You’ll spend fewer hours in the garage or driveway installing this 4-pin connector and more time on the lake.

Hopkins 48265 30′ 4 Wire Flat Trailer Side Y-Harness Connector

Hopkins Towing Solutions
amazon.com

$20.99

4. CZC Auto Trailer Wiring Harness Kit

It’s no surprise that CZC Auto, one of the longest-lived brands, produces an excellent trailer wiring harness kit. CZC Auto uses only the most superior materials available in their products, such as their boat trailer light connector’s copper core.

This harness’s internal structure is covered in anti-UV PVC material for optimal longevity. The PVC boat trailer plug uses corrosion-resistant nickel-plated copper terminals. With this wiring kit, you don’t have to worry about backing your boat trailer’s taillights into the water for extended periods of time. CZC offers a two-year guarantee.

With almost 30 ft of wire, this boat trailer harness should cover the longest trailers with excess. It uses a standard 4-pin connector for 12v trailers. It comes with five male connectors, four female plug wires, and two working lines that split from the trailer’s lights.

CZC AUTO Trailer Wiring Harness Kit 4-Way Wishbone Style Y Style 18AWG Pure Copper Core Color Coded Wire with Standard 4-pin Flat Plug Connector, 4′ Female and 25′ Male for 12V Trailer Boat

CZC AUTO
amazon.com

$10.99

5. Suzco Flat Trailer Light Wiring Harness

Suzco is known for making functional and resilient trailer wiring kits. This company’s wiring harness lets you focus on your land and water-based adventures without having to worry about your trailer’s wiring.

This kit comes standard with a 25 ft female and male boat trailer wiring harness with four-way conductors and a color-coded ground wire. The wiring provided is made of 18 gauge cables that run along the sides of the trailer before connecting at the tongue. Basic lighting connections are made simple with its four-way wiring design.

This marine trailer harness uses color-coded wires and fuse cables making splicing into your current wiring system a breeze. Their terminals are completely sealed and 100 percent rust-proof. The company gives a two-year warranty, so you know you’ll be buying a reliable product.

SUZCO 25 Foot 4 Wire 4-Flat Trailer Light Wiring Harness Extension Kit, 4-Way Plug 4 Pin Male & Female Extension Connector & Wishbone-Style with 18 Gauge White Ground Wire with SAE J1128

6. Online LED Store Flat Trailer Wiring Harness

This wiring kit will take all worries away with its dual male and female edges. This product is SAE J1128 rates and uses a minimal voltage main cable. This wiring harness is made for low voltage systems of 60v direct current.

Online LED Store has been selling top-notch LED and wiring accessories for years. Their flat trailer wiring harness is the ideal harness for trailers over 80 inches wide but can easily be used on thinner trailers as well. Its wishbone shape makes for an easy fit and a smooth setup process. Wiring tail lights and side runners couldn’t be simpler.

The color-coded wiring ensures you’ll never get confused during installation, making installation safer and quicker. It uses 18 AWG wires and runs over 30 ft in length.

4 Pin Flat Trailer Wiring Harness Kit [Wishbone-Style] [SAE J1128 Rated] [25′ Male & 4′ Female] [18 AWG Color Coded Wires] 4 Way Flat 5 Wire Harness For Utility Boat Trailer Lights Kits

ONLINE LED STORE
amazon.com

$13.50

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