Oyviny 5 Way Flat Trailer Wiring Harness Plug
4.6Editor score
22 Inch Wire Lead
Corrosion Resistant Brass
Ergonomic Grip Design
In this guide
Choosing the right trailer wiring plug ensures your lights function safely on the road. A quality harness connects your vehicle to trailer signals efficiently without failure.
We evaluated ten top rated models based on wire gauge durability and connector quality. Our list covers options for marine utility and general towing applications today.
Each pick highlights key specs and installation ease for practical buyers. Prices fluctuate regularly so check current listings before finalizing your purchase decision.
Top 3 Picks for Best 5 Way Flat Trailer Wiring Harness Plug
RED WOLF 5-Way Flat Trailer Wire Harness
4.7Editor score
Male and Female Connectors
18 AWG Heavy Duty Wire
Wide Application Range
CURT 58550 Vehicle-Side and Trailer-Side
4.7Editor score
72 Inch Wire Lead
Durable Rubber Housing
Easy Grip Tabs
Top 10 Best 5 Way Flat Trailer Wiring Harness Plug in 2026 Compared
This comparison table lists all ten top rated harnesses side by side. Review the specs and features to find the perfect match for your specific trailer setup needs.
ProductsSpecificationsEditor scorePrice
Editor's Choice
Oyviny 5 Way Flat Trailer Wiring Harness Plug
22 Inch Wire Length
18 AWG Gauge
Brass Terminals
Split Wire Design
4.6Editor score
Editor's Choice
RED WOLF 5-Way Flat Trailer Wire Harness
22 and 31 Inch
18 AWG Gauge
Male Female Set
Color Coded Wires
4.7Editor score
Best Premium
Oyviny 5 Way Flat Trailer Wire Extension
48 Inch Wire Loop
18 AWG Gauge
Universal Socket Fit
Rubber Molded Body
4.7Editor score
5 Pin Trailer Connector 14AWG Pure Copper Wire
25 Inch Wire Length
14 AWG Gauge
Pure Copper Wire
PVC Insulation
4.2Editor score
Oyviny 4 Pin 5 Wire Trailer Wiring Harness
18 Inch Wire Length
16 AWG Gauge
Y Split Design
Anti Slip Tabs
4.9Editor score
5 Way Flat Trailer Wiring Harness Plug
22 Inch Wire Length
18 AWG Gauge
Corrosion Resistant
5 Way Flat Plug
4.6Editor score
5 Way Trailer Connector Wire 40 inch Jacketed Cable
40 Inch Wire Length
18 AWG Gauge
Black Sheathing
Dust Cover
4.3Editor score
CURT 58550 Vehicle-Side and Trailer-Side
72 Inch Wire Lead
16 AWG Gauge
Molded Rubber
Easy Grip Design
4.7Editor score
Nilight 5 Way Flat Trailer Wiring Harness Plug
22 Inch Wire Length
18 AWG Gauge
Weatherproof Cable
Blunt Cut Wires
4.9Editor score
Oyviny Vehicle-Side 5 Way Flat Trailer Wiring Harness
31 Inch Wire Loop
Brass Terminals
Female Plug Connector
SAE J1128 Spec
4.7Editor score
1. Oyviny 5 Way Flat Trailer Wiring Harness Plug – Best Overall 5 Way Flat Trailer Wiring Harness Plug
Oyviny 5 Way Flat Trailer Wiring Harness Plug
22 Inch Wire Lead
18 AWG Gauge
Corrosion Resistant
Color Coded Wires
The Oyviny 5 Way Flat Trailer Wiring Harness Plug stands out with a 4.6 rating and solid construction. Its 22 inch lead provides enough reach for most standard trailers while keeping things compact.
Pros
- Durable brass terminals
- Color coded wires for easy install
- Split wire design for taillights
- Ergonomic grip for plugging
- Includes dust cover protection
Cons
- Shorter wire length for some setups
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Key strengths include the brass terminals and tin plated surfaces that resist corrosion over time. The color coded wires correspond to tail lights brake lights turn signals reverse lights and ground making identification straightforward.
The split wire design allows direct connection to each taillight without extra jumpers. This saves time during installation and reduces potential failure points in your electrical setup.
Buyers looking for a reliable plug with easy setup will appreciate this model. Its ergonomic tabs help with grip when connecting or disconnecting your trailer frequently.
Superior Material Quality
The brass and tin plated terminals ensure long term conductivity without rust issues.
Simplified Wiring Process
Color coding and pre stripped ends make the splicing process much faster for users.
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2. RED WOLF 5-Way Flat Trailer Wire Harness – Top Rated 5 Way Flat Trailer Wiring Harness Plug
RED WOLF 5-Way Flat Trailer Wire Harness
22 and 31 Inch
18 AWG Gauge
Male Female Set
Heavy Duty Bonded
This harness offers a male and female pair rated at 4.7 stars. It connects your vehicle socket to trailer lights effectively with a robust 18 AWG cable design.
Pros
- Includes both male and female connectors
- Longer female lead for vehicle trunk
- Wide application range for trailers
- Corrosion resistant brass terminals
- 18 AWG heavy duty wire
Cons
- Male connector shorter than female
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The female extension reaching 31 inches allows you to keep the vehicle connector inside the trunk or minivan. This protects the socket from road debris while maintaining a solid connection point.
Installation is straightforward as the wires are pre stripped and ready to splice. The color coded bonding ensures you connect tail lights brake lights turn signals and reverse lights correctly every time.
Ideal for cargo trailers boat trailers or RVs this kit provides flexibility. Its durable construction ensures reliability even in marine or harsh weather conditions.
Vehicle Socket Protection
Keep your vehicle connector in the trunk with the long female cable to avoid wear.
Durable Wiring Design
Heavy duty bonded loop wire makes splicing into existing vehicle systems easier.
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3. Oyviny 5 Way Flat Trailer Wire Extension – Durable 5 Way Flat Trailer Wiring Harness Plug
Oyviny 5 Way Flat Trailer Wire Extension
48 Inch Wire Loop
18 AWG Gauge
Universal Socket Fit
Rubber Molded Body
Rated 4.7 this extension harness provides a generous 48 inch loop. It is perfect for replacing worn out harnesses where extra reach is needed for installation.
Pros
- 48 inch loop offers plenty of length
- Both male and female ends included
- Universal fit for 5 way plugs
- Rubber molded waterproof connectors
- Pure copper wires for conductivity
Cons
- Bulkier due to wire loop design
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The male and female ends allow it to serve as an extension or a replacement. Its rubber molded construction ensures better waterproofing and longer life compared to basic plastic plugs.
Color coded 18 gauge wires stand for tail lights brake lights turn signals and ground. This standardization makes it compatible with almost any vehicle or trailer with a 5 way plug.
Buyers needing significant extra length for a flexible setup will benefit from this loop. It provides electricity to back lights safely without cutting the original harness.
Extended Reach Capability
The 48 inch loop gives you flexibility in routing wires around complex trailer frames.
Waterproof Protection
Rubber molding on connectors seals out moisture to prevent electrical shorts effectively.
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4. 5 Pin Trailer Connector 14AWG Pure Copper Wire – Heavy Duty 5 Way Flat Trailer Wiring Harness Plug
5 Pin Trailer Connector 14AWG Pure Copper Wire
25 Inch Wire Length
14 AWG Gauge
Pure Copper Wire
Thick PVC Insulation
This connector features a 14 AWG pure copper design rated at 4.2 stars. It is built for stability and superior conductivity with a focus on durability.
Pros
- 14 AWG gauge for stability
- Pure copper wire for conductivity
- Thick PVC insulation resists wear
- 25 inch perfect length routing
- Split wire design for clean install
Cons
- Lower rating than other options
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The thick PVC insulation protects against abrasion aging and corrosion. This ensures reliable performance in all weather conditions whether you are towing on highways or rough terrain.
A split wire design allows you to run wires directly to each taillight. No jumper wires are needed across the trailer frame making the setup cleaner and more professional.
Ideal for utility ATV or cargo trailers this plug fits standard vehicle sockets. Its 25 inch length provides ample room for flexible installation quickly.
Enhanced Conductivity
Pure copper 14 gauge wire ensures minimal voltage drop over long wiring runs.
Robust Insulation
Thick PVC coating protects wires from physical damage and environmental exposure.
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5. Oyviny 4 Pin 5 Wire Trailer Wiring Harness – Best for Utility 5 Way Flat Trailer Wiring Harness Plug
Oyviny 4 Pin 5 Wire Trailer Wiring Harness
18 Inch Wire Length
16 AWG Gauge
Y Split Design
Ergonomic Grip
This harness has an impressive 4.9 rating and is designed for utility trailer rewiring. It uses 16 AWG pure copper wires for a reliable connection every time.
Pros
- 4.9 high rating
- 16 AWG pure copper wires
- Y split design for taillights
- Anti slip tabs for grip
- Rubber dust cover included
Cons
- Specific for 4 pin flat replacement
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The Y split design separates the five wires easily so you can run to both sides of the taillights. This eliminates the need to run a wire across the axle like many other kits.
Color coded wires help identify each function clearly during installation. The ergonomic anti-slip tabs on the plug help you grip it better when connecting or disconnecting.
If you need a short 18 inch harness for boat or ATV trailers this is a top choice. The rubber dust cover protects the plug from water and dust when stored.
Efficient Wiring Layout
The Y split eliminates axle crossing wires for a cleaner trailer electrical setup.
Reliable Copper Wire
Thick 16 AWG pure copper wires provide excellent conductivity and signal stability.
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6. 5 Way Flat Trailer Wiring Harness Plug – Compact 5 Way Flat Trailer Wiring Harness Plug
5 Way Flat Trailer Wiring Harness Plug
22 Inch Wire Length
18 AWG Gauge
Corrosion Resistant
5 Way Flat Plug
Rated 4.6 this harness is a straightforward 22 inch option. It uses 18 AWG wires to provide power to tail lights turn signals backup lights and brake lights effectively.
Pros
- 22 inch standard length
- Corrosion resistant brass
- Good conductivity tinned terminals
- Wide usage range
- Simple single harness package
Cons
- Basic feature set compared to others
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The material includes corrosion resistant brass and tinned terminals. This combination ensures good conductivity and resists corrosion for a long time even in wet conditions.
It is widely used for multi-purpose cargo trailer hitch devices including horse and motorcycle trailers. The simple design makes it easy to find and install for standard needs.
Buyers looking for a basic reliable plug without extra complexity will find this suitable. It serves as a direct extension or replacement for standard 5 way flat connectors.
Standard Compatibility
Fits standard 5 way flat sockets to ensure seamless integration with existing setups.
Corrosion Protection
Tinned terminals and brass materials prevent rust from degrading electrical connections.
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7. 5 Way Trailer Connector Wire 40 inch Jacketed Cable – Long Reach 5 Way Flat Trailer Wiring Harness Plug
5 Way Trailer Connector Wire 40 inch Jacketed Cable
40 Inch Wire Tail
18 AWG Gauge
Black Cable Sheathing
Color Coded Inside
This connector has a 40 inch wire tail rated at 4.3 stars. The longer length than standard cords helps reach deeper or further connection points on larger trailers.
Pros
- 40 inch longer wire length
- Black sheathing for protection
- Corrosion resistant brass
- Cable clips for grip
- Good waterproof performance
Cons
- Sheathing may hide wire colors
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A black cable protective sleeve wraps the color cables to improve waterproof performance. This sheathing prevents the yellow green brown and white cables from being exposed to wear.
It uses corrosion resistant brass and tinned terminals for good conductivity. The pure copper wire inside ensures signals reach taillights brake lights and turn lights properly.
Buyers needing extra length without sacrificing protection should consider this plug. It includes clips on both sides of the plug to provide a better grip during use.
Extra Wire Length
The 40 inch tail offers more flexibility for routing around complex trailer frames.
Protected Wiring
Black sheathing keeps wires safe from abrasion while maintaining clear internal colors.
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8. CURT 58550 Vehicle-Side and Trailer-Side – Premium 5 Way Flat Trailer Wiring Harness Plug
CURT 58550 Vehicle-Side and Trailer-Side
72 Inch Wire Lead
16 AWG Gauge
Molded Rubber Housing
Easy Grip Tabs
This CURT harness is rated 4.7 and features 72 inch wires for maximum flexibility. Its rubber housing is designed to never rust or corrode over time.
Pros
- 72 inch long wire lead
- 16 AWG heavy duty wire
- Rubber housing that never rusts
- Ergonomic design for grip
- Industry standard match
Cons
- Premium price point
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The 16 gauge wires can be used to connect taillights brake lights turn signals and reverse lights effectively. This gauge provides sufficient power for most trailer light functions without issues.
Its molded rubber housing ensures long lasting use and a reliable connection. Ergonomic tabs on the sides offer a better grip when plugging in or unplugging your trailer.
Those needing extra length and premium materials will appreciate this model. It is a great replacement for old worn out harnesses in standard 5 way flat setups.
Maximum Wire Length
The 72 inch wire lead provides ample extra length for flexible installation options.
Longevity Material
Molded rubber housing resists rust and corrosion for years of reliable service.
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9. Nilight 5 Way Flat Trailer Wiring Harness Plug – Reliable 5 Way Flat Trailer Wiring Harness Plug
Nilight 5 Way Flat Trailer Wiring Harness Plug
22 Inch Wire Length
18 AWG Gauge
Weatherproof Sheath
Rated 300V
This Nilight plug has a high 4.9 rating and uses heavy duty 18 gauge wires. Its weatherproof sheath protects wires from abrasion and aging effectively.
Pros
- 4.9 high user rating
- Heavy duty 18 gauge wires
- Excellent weatherproof sheath
- Blunt-cut color-coded wires
- Heat resistant to 105C
Cons
- Blunt cut wires require stripping
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The wires are blunt cut and color coded making them ready to splice into existing wiring. This eliminates electrical tape and exposed wires found on older 5 prong setups.
Rated at 300V with 105C heat resistance it extends the wiring system with more flexibility. The pure copper terminals ensure excellent connections for basic lighting functions.
Buyers seeking a superior upgrade for broken wires will find this reliable. It provides a convenient male plug arrangement for marine boat horse and ATV trailers.
Weatherproof Protection
Abrasion proof cable sheath ensures stability in different kinds of weather conditions.
Clear Wire Identification
Color coded wires make it easy to identify each wire's function clearly.
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10. Oyviny Vehicle-Side 5 Way Flat Trailer Wiring Harness – Female 5 Way Flat Trailer Wiring Harness Plug
Oyviny Vehicle-Side 5 Way Flat Trailer Wiring Harness
31 Inch Wire Loop
Female Plug Connector
Brass Terminals
SAE J1128 Spec
Rated 4.7 this harness features a 31 inch wire loop for vehicle side connections. It is designed to splice into trailer wiring to provide a connection to the vehicle socket.
Pros
- 31 inch wire loop length
- Female plug extension cable
- Brass terminals for conductivity
- SAE J1128 compliance
- Ergonomic design tabs
Cons
- Female plug only extension
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Resisting corrosion brass and tin-plated terminals provide good conductivity for reliable operation. The rubber dust cover makes the adapter better waterproof for longer usage life.
Color coded wires conform to SAE J1128 interface specifications to make matching and use clear. The tabs on both sides of the plug offer a better grip when handling it.
Ideal for creating or extending a vehicle side socket this model provides flexibility. It serves as a female plug extension cable for standard 5 way flat plugs.
Standard Compliance
Color coded wires conform to SAE J1128 interface specs for clear matching and use.
Grip Design
Ergonomic tabs on both sides offer a better grip when plugging in or out.
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Buying Guide – How to Choose the Best 5 Way Flat Trailer Wiring Harness Plug
Selecting the right wiring harness requires attention to wire gauge length and connector type. This guide details the factors that influence performance and durability.
Wire Gauge Size
Wire gauge determines how much electrical current the harness can carry safely. Common gauges are 16 AWG and 18 AWG with 14 AWG being thicker. Thicker wires like 14 AWG provide better conductivity and handle higher loads without voltage drop.
Choose a wire gauge that matches your lighting setup requirements for optimal performance.
Connector Type
A 5 way flat plug connects your vehicle to trailer signals like turn lights brake lights and reverse lights. Ensure the plug type matches your tow vehicle socket and trailer receptacle for a secure fit.
Match the connector type to your existing vehicle and trailer sockets to avoid adapters.
Wire Length
Wire length impacts how easily you can route the harness from vehicle to trailer. Standard lengths range from 18 inches to 72 inches. Longer wires give you flexibility for routing but may be more prone to tangling if excess is not managed.
Select a length that allows clean routing without excess slack or tension on connections.
Material Quality
High quality harnesses use brass or tinned terminals that resist corrosion. Pure copper wires inside ensure stable electrical flow over time. Avoid cheap zinc or steel terminals that rust quickly and disrupt signals.
Prioritize brass and pure copper materials for long term reliability.
Weatherproofing
Trailer harnesses face exposure to rain mud and road spray. Look for rubber molded bodies and dust covers that protect terminals from water. Some models also use weatherproof cable sheaths to shield wires.
Ensure the plug includes dust covers or rubber seals for waterproof performance.
Installation Ease
Many modern harnesses come pre stripped with color coded wires. This makes splicing into your existing wiring much easier. A color code helps identify tail lights brake lights turn signals and ground instantly.
Look for pre stripped and color coded wires to simplify installation steps.
Ergonomic Features
Plugs with tabs on the sides offer a better grip when plugging in or unplugging. This ergonomic design helps prevent accidental disconnections and makes maintenance easier.
Choose plugs with grip tabs for easier handling during use.
Compatibility
Ensure the harness is compatible with your trailer type such as marine utility or cargo. Some harnesses support hydraulic brakes while others support basic lighting. Check the application notes for specific uses.
Verify compatibility with your trailer type and brake system before buying.
How to Use and Care for Your 5 Way Flat Trailer Wiring Harness Plug
Before installation inspect your harness for any frayed wires or damaged connectors. Ensure the color coded wires match your trailer lights functions before splicing them.
Use electrical tape or heat shrink tubing to seal any splice connections against moisture. Plug the harness into your vehicle socket firmly and test all lights with your tow vehicle engine running.
After each trip clean the plug with a dry cloth and apply dielectric grease to terminals. Store the harness with the dust cover on to prevent dirt buildup between uses.
Frequently Asked Questions
What is a 5 way flat trailer plug used for?
A 5 way flat trailer plug is used to connect vehicle signals to trailer lights and control trailer brake functions. It handles tail lights brake lights turn signals and reverse lights plus one pin for ground. This setup is ideal for marine trailers with hydraulic or surge brakes.
How do I know which wire is which?
Most quality harnesses use color coded wires so you can identify each function quickly. Typically the colors correspond to tail lights brake lights turn signals reverse lights and ground. Refer to the included manual for the exact color map of your model.
Can I use this for boat trailers?
Yes many of these harnesses are designed specifically for marine boat trailers. They feature waterproof connectors and corrosion resistant materials to withstand exposure to water. Just ensure the plug type matches your boat trailer socket.
What wire gauge should I choose?
For most small utility trailers 18 AWG is sufficient. For heavier loads or longer wire runs 16 AWG or 14 AWG provides better conductivity. Thicker wires reduce voltage drop and ensure lights stay bright.
How long is the typical wire length?
Typical wire lengths range from 18 inches to 72 inches. Shorter lengths like 18 inches work for direct connections while longer ones like 72 inches allow flexible routing. Choose based on how far your socket is from the hitch.
Do these plugs need grease?
Applying dielectric grease to terminals helps prevent corrosion and ensures good conductivity. It is recommended for outdoor or marine use where moisture is present. Check if the plug includes a dust cover for added protection.
What if my vehicle has a different plug?
If your vehicle socket differs from a 5 way flat you may need an adapter. Many retailers sell vehicle side to trailer side adapters. Alternatively replace the socket on your vehicle to match the trailer plug.
Are these plugs universal?
Many 5 way flat plugs are universal for trailers and tow vehicles with a 5 way plug system. They fit standard sockets commonly found on RVs cars and trucks. Always check the specific product notes for compatibility details.
Final Thoughts on Choosing the Best 5 Way Flat Trailer Wiring Harness Plug
The Oyviny 5 Way Flat Trailer Wiring Harness Plug RED WOLF harness and CURT 58550 top our list for performance. Each offers unique strengths like grip design length and material durability for towing.
Prioritize wire gauge and weatherproofing when choosing a harness for your trailer. Proper installation and regular care will extend the life of your plug significantly.
Prices fluctuate frequently so check current listings before making your final decision. Ensure your chosen harness matches your trailer type for safe reliable towing.