Oyviny 5 Way Flat Trailer Wiring Harness Plug
4.6Editor score
22 inch wire lead included
Corrosion resistant brass terminals
Split wire design for taillights
In this guide
Choosing the right wiring harness ensures your trailer lights function correctly and safely on the road. A quality plug resists corrosion and handles weather exposure while maintaining strong electrical contact for all signals.
We analyzed ten highly rated products based on wire gauge, connector material, and user feedback. This list covers options from budget-friendly picks to premium kits with extended lengths for versatile towing setups.
Each selection highlights key features like corrosion resistance and easy installation. Note that prices fluctuate frequently, so verify current costs before purchasing to ensure you get the best value available.
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 extension included
18 AWG color coded wiring
Wide range of applications
CURT 58550 Vehicle-Side and Trailer-Side
4.7Editor score
72 inch wire lead length
Durable black molded rubber housing
Ergonomic design with grip tabs
Top 10 Best 5 Way Flat Trailer Wiring Harness Plug in 2026 Compared
This table provides a side-by-side comparison of all ten selected products. It highlights key specifications like wire length and gauge to help you find the perfect match for your trailer setup.
ProductsSpecificationsEditor scorePrice
Best Budget
Oyviny 5 Way Flat
22 Inch Wire Lead
18 AWG Wire Gauge
Brass Tin Plated Terminals
Split Wire Design Included
4.6Editor score
Editor's Choice
RED WOLF 5-Way
22 Male 31 Female Inch
18 AWG Bonded Loop Wire
Corrosion Resistant Construction
Universal Plug Adapter Kit
4.7Editor score
Best Premium
Oyviny 5 Way Extension
48 Inch Extension Length
Male Female End Connectors
Universal 5 Way Socket
Rubber Molded Connectors
4.7Editor score
5 Pin Trailer Connector
25 Inch Wire Length
14 AWG Pure Copper Wire
Dust Cover Included
Separate Wires per Light
4.2Editor score
Oyviny 4 Pin 5 Wire
18 Inch Short Harness
16 AWG Pure Copper
Y Split Design
Ergonomic Anti Slip Tabs
4.9Editor score
5 Way Flat Trailer Plug
22 Inch Harness Size
18 AWG Wire Gauge
Corrosion Resistant Brass
Universal Cargo Trailer Use
4.6Editor score
5 Way Trailer Connector Wire
40 Inch Jacketed Cable
18 AWG Wire Gauge
Black Sheathing Protection
Easy Install Clips Included
4.3Editor score
CURT 58550
72 Inch Wire Lead
16 Gauge Wire Thickness
Black Molded Rubber Housing
Vehicle Trailer Connectors
4.7Editor score
Nilight 5 Way Flat
22 Inch Wire Length
18 Gauge Pure Copper
Weatherproof Sheath Cable
300V Rated Voltage
4.9Editor score
Oyviny Vehicle-Side 5 Way
31 Inch Wire Loop
Female Plug Connector
SAE J1128 Compliance
Dust Cover Included
4.7Editor score
1. Oyviny 5 Way Flat Trailer Wiring Harness Plug – Best Overall Budget Option
Oyviny 5 Way Flat Trailer Wiring Harness Plug
22 Inch Wire Lead
18 AWG Wire Gauge
Corrosion Resistant Brass
Split Wire Design
The Oyviny 5 Way Flat Trailer Wiring Harness Plug offers exceptional value for budget-conscious buyers seeking reliable performance. With a solid 4.6 rating from thousands of users it delivers consistent connectivity for your trailer lights and signals.
Pros
- Easy installation with pre-stripped wires
- Durable brass terminals resist rust
- Split wire simplifies taillight setup
- Affordable price point
- Ergonomic design for better grip
Cons
- Shorter lead length for some setups
- Basic dust cover included
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Its standout quality is the split wire design which eliminates the need for jumper wires across the taillights. The pre-stripped 18AWG wires are color-coded for quick identification and the corrosion resistant brass terminals ensure long-term durability against the elements.
While the 22 inch lead is sufficient for many standard setups it might require extension for larger vehicles. The dust cover is functional but basic compared to premium options. These minor trade-offs are acceptable given the low cost and high reliability.
Anyone needing a straightforward replacement plug without breaking the bank should consider this model. It is an ideal choice for routine maintenance or upgrading older harnesses on boats and utility trailers.
Effortless Installation Process
Pre-stripped wires and clear color-coding allow users to splice connections quickly without specialized tools.
Weather Resistant Design
Brass and tin-plated terminals combined with a rubber dust cover protect against moisture and corrosion.
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2. RED WOLF 5-Way Flat Trailer Wire Harness – Best Complete Adapter Kit
RED WOLF 5-Way Flat Trailer Wire Harness
Male 22 Female 31 Inch
18 AWG Bonded Wiring
Brass Tinned Terminals
Dual Connector Package
The RED WOLF 5-Way Flat Trailer Wire Harness stands out as the top choice for versatility. It provides both a male and female connector in one package allowing for flexible installation options for different vehicle types.
Pros
- Includes both male and female connectors
- Longer female lead for trunk routing
- Heavy duty bonded wire loops
- Versatile marine and cargo use
- High user satisfaction rating
Cons
- Requires splicing at one end
- Slightly higher price than single plug
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Key strengths include the heavy duty bonded loop wire that simplifies splicing into your vehicle system. The female end offers 31 inches of lead which is particularly useful for routing connections through a trunk or minivan without reaching issues.
Installation requires splicing on the vehicle side which might challenge beginners. The price is marginally higher but the added length and dual connector functionality justify the cost for most users. It balances convenience and quality well.
This kit is perfect for RV owners or those with complex wiring needs who want a complete solution. It ensures your lights function correctly whether you are towing a boat or a cargo trailer.
Flexible Connector Options
The inclusion of both plug types adapts to various vehicle and trailer wiring configurations seamlessly.
Enhanced Lead Length
A 31-inch female lead provides extra reach for hard-to-reach connection points inside vehicles.
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3. CURT 58550 Vehicle-Side and Trailer-Side – Best Premium Long Length Kit
CURT 58550 Vehicle-Side and Trailer-Side
72 Inch Wire Lead
16 Gauge Wire Thickness
Molded Rubber Housing
Ergonomic Design
The CURT 58550 kit is the premium choice for those requiring maximum reach and durability. Its 72-inch wires are significantly longer than most competitors making it ideal for vehicles where the tow hitch is far from the engine.
Pros
- Extra long 72 inch wires
- High quality rubber housing
- Easy grip tabs for plugging
- Industry standard plug match
- Reliable brand reputation
Cons
- Higher price point than others
- Long wires may need securing
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The durable black molded rubber housing ensures the connectors never rust or corrode even in harsh weather conditions. Ergonomic grip tabs on both sides of the plug make it easy to plug and unplug without struggling with tight spaces.
The main drawback is the cost which is higher than other options on this list. Additionally the long wires must be managed properly to prevent dragging. These factors are acceptable for users prioritizing convenience and build quality.
Truck owners and heavy equipment users will benefit most from this harness. It provides a secure reliable connection that stands up to demanding usage while simplifying the towing process.
Superior Wire Length
The 72-inch leads offer unparalleled flexibility for routing wires through larger vehicles like trucks.
Robust Construction
Molded rubber housing ensures long-lasting performance without risk of rust or corrosion over time.
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4. 5 Pin Trailer Connector – Best High Conductivity Option
5 Pin Trailer Connector
14 AWG Pure Copper
25 Inch Wire Length
Separated Wire Design
Dust Cover Included
This connector stands out due to its 14 AWG pure copper wires which offer superior conductivity compared to standard 18 AWG options. The thicker gauge ensures stable power delivery for lights even in demanding electrical conditions.
Pros
- Thicker 14 AWG pure copper wire
- Separate wires per light
- PVC insulation resists aging
- Affordable price
- Universal fit for 5-way
Cons
- Lower user rating than others
- Shorter wire length
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The separated wire design allows for direct connections to each taillight eliminating cross-wiring issues. PVC insulation protects against abrasion and aging ensuring the harness remains functional through seasons of use.
It ranks slightly lower in user feedback possibly due to installation preferences or lead length. The 25 inch length might not reach all vehicle setups. Despite this the material quality is high for the price point.
Users seeking maximum electrical conductivity for heavy loads should consider this plug. It is best suited for utility trailers where reliable signal transmission is the top priority.
Enhanced Electrical Flow
Thick 14 AWG copper wires minimize resistance for consistent light performance.
Individual Wire Routing
Separate wires simplify the process of connecting directly to each light fixture.
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5. Oyviny 4 Pin 5 Wire Trailer Wiring Harness – Best Compact Replacement
Oyviny 4 Pin 5 Wire Trailer Wiring Harness
18 Inch Length
16 AWG Pure Copper
Y Split Design
Anti-Slip Tabs
This harness is an excellent choice for smaller trailers needing a quick rewiring solution. Its 4.9 rating reflects high user satisfaction with the durability and ease of installation for utility vehicles.
Pros
- Excellent 4.9 customer rating
- 16 AWG pure copper wires
- Y split avoids axle crossing
- Ergonomic grip tabs
- Perfect for small trailers
Cons
- 4 pin style not 5 pin
- Very short wire length
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The 16 AWG pure copper wires provide a robust connection while the Y split design eliminates the need to run wires across the axle. This simplifies installation and reduces wear on the wiring system over time.
While the 18 inch length is short it is sufficient for compact setups like boat trailers. Note this is a 4-pin style plug which differs from the 5-way standard in other reviews. It fits specific needs perfectly.
Owners of smaller trailers or ATVs will find this product highly efficient. It is a quick and reliable way to restore proper lighting functions without complex modifications.
Simplified Wiring Layout
The Y-split design keeps wires organized and avoids the messy axle crossing common in other kits.
Superior Material Quality
Pure copper construction ensures stable electrical flow and resistance to environmental wear.
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6. 5 Way Flat Trailer Wiring Harness Plug – Best Standard Replacement
5 Way Flat Trailer Wiring Harness Plug
22 Inch Harness Size
18 AWG Wire Gauge
Corrosion Resistant Brass
Male Connector Only
This plug offers a straightforward and affordable solution for trailer wiring needs. It features standard 18 AWG wire and a corrosion-resistant brass construction ensuring reliable functionality for daily towing tasks.
Pros
- Affordable price point
- Standard 18 AWG wire
- Corrosion resistant brass
- Easy plug and play fit
- Widely applicable use
Cons
- Basic design with no extras
- No dust cover included
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The 22-inch lead provides adequate reach for most standard vehicle connections. Brass terminals help resist rust in wet environments ensuring the contact remains clean. It is a no-nonsense option for basic electrical requirements.
It lacks extra features like a dust cover or split wires. Users needing more flexibility might look elsewhere. However the low price and reliable performance make it a good baseline choice.
For those needing a direct replacement for an old plug this model works well. It ensures your trailer lights function correctly without unnecessary frills or high costs.
Budget Friendly Value
This plug provides essential wiring functions at one of the lowest price points available.
Reliable Electrical Contact
Corrosion-resistant brass terminals maintain a strong connection over years of use.
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7. 5 Way Trailer Connector Wire – Best Long Reach Option
5 Way Trailer Connector Wire
40 Inch Jacketed Cable
18 AWG Wire Gauge
Black Sheathing Protection
Male Connector Only
This harness solves the problem of limited reach with its 40-inch jacketed cable. It connects effectively to your trailer lights while providing enough slack for complex vehicle setups.
Pros
- Extra long 40 inch cable
- Black protective sheathing
- Corrosion resistant materials
- Easy plug and play fit
- Suitable for wide use
Cons
- Slightly lower user rating
- Basic plug design
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The black protective sheathing wraps the wires to improve waterproof performance and durability. Brass terminals ensure good electrical conductivity over time. It is a simple yet effective solution for extending your existing wiring.
User feedback is good but slightly lower than top contenders. The basic design offers no extra features like split wires. However the added length makes it a practical choice for specific needs.
Users with trucks or vans requiring more slack should look at this option. It ensures your lights remain connected securely without stretching wires tight during turns.
Extended Cable Length
The 40-inch lead offers significant extra reach for hard-to-wire trailer locations.
Protective Jacket
Black sheathing enhances waterproofing and protects wires from environmental wear.
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8. Nilight 5 Way Flat Trailer Wiring Harness Plug – Best High Rated Basic Plug
Nilight 5 Way Flat Trailer Wiring Harness Plug
22 Inch Wire Length
18 Gauge Pure Copper
Weatherproof Sheath
300V Rated Voltage
Nilight delivers a high-quality basic plug with a perfect 4.9 rating from users. It focuses on durability with heavy-duty wires and a weatherproof cable sheath that resists abrasion and corrosion.
Pros
- High 4.9 user rating
- Heavy duty 18-gauge wires
- Pure copper terminals
- Weatherproof cable sheath
- Color coded wires
Cons
- Basic 22-inch length
- No dust cover included
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The pure copper terminals provide excellent conductivity ensuring your lights perform well. Color-coded wires simplify installation and reduce errors. It is a reliable choice for standard trailer setups.
While it lacks a dust cover or extra length it makes up for it in build quality. The price is competitive for a unit with such strong feedback. It stands out for reliability.
This plug is ideal for users who want a trusted brand with proven performance. It fits standard 5-way sockets and ensures consistent lighting for your towing adventures.
Durable Build Quality
Heavy-gauge wires and pure copper terminals ensure long-lasting and reliable electrical performance.
User Trusted Brand
A near-perfect user rating confirms this plug is a dependable choice for many drivers.
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9. Oyviny Vehicle-Side 5 Way Flat Trailer Wiring Harness – Best Female Connector Plug
Oyviny Vehicle-Side 5 Way Flat Trailer Wiring Harness
31 Inch Wire Loop
Female Plug Connector
SAE J1128 Compliance
Dust Cover Included
This female connector plug offers a unique solution for vehicle-side installations. It provides a dedicated 31-inch loop that simplifies extending your vehicle's wiring to match trailer needs.
Pros
- Female plug for vehicle socket
- 31 inch wire loop length
- Complies with SAE standards
- Includes protective dust cover
- Easy installation design
Cons
- Not for trailer end use
- Specific to 5-way sockets
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The design complies with SAE standards ensuring compatibility and safety. Brass terminals and a dust cover protect the connection from moisture and dirt. It is a smart upgrade for older vehicles with worn sockets.
It is not suitable for the trailer end of the setup. Users must match the plug type to their specific wiring need. This specificity adds value by reducing confusion during selection.
Vehicle owners needing to extend their existing harness should consider this female plug. It ensures a secure fit and improves reliability for your towing system.
Vehicle Side Compatibility
The female connector matches standard vehicle sockets for seamless integration into existing wiring.
Standard Compliance
Adhering to SAE standards ensures safety and compatibility with industry specifications.
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10. Oyviny 5 Way Flat Trailer Wire Extension – Best Extension Kit
Oyviny 5 Way Flat Trailer Wire Extension
48 Inch Extension Length
Male Female End Connectors
Universal 5 Way Socket
Rubber Molded Housing
This extension kit provides a comprehensive solution for long towing setups. With 48 inches of lead it bridges the gap between vehicle and trailer comfortably without stressing the original harness.
Pros
- 48-inch total extension length
- Universal 5-way socket
- Durable rubber connectors
- Plug and play installation
- High user satisfaction
Cons
- More expensive than single plugs
- Requires existing socket match
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Both male and female ends are included making it versatile for replacing worn out sections or extending length. The rubber molded connectors offer durability and waterproofing which ensures longevity in harsh environments.
The price is higher than basic plugs but the extra length and dual connector design justify the cost. It is a practical choice for those who need flexibility. Installation is straightforward with color-coded wires.
Truck owners or boat lovers needing significant reach should choose this kit. It ensures your lights remain powered reliably and provides an easy fix for short wiring issues.
Extended Reach Capability
The 48-inch loop provides ample length for flexible routing and easy installation.
Universal Compatibility
Standard 5-way sockets ensure this extension fits most common trailer and vehicle types.
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Buying Guide – How to Choose the Best 5 Way Flat Trailer Wiring Harness Plug
Selecting the right harness involves understanding wire gauge length and connector material. These factors directly impact the reliability and longevity of your trailer's lighting system.
Wire Gauge and Material
Wire gauge determines conductivity and resistance to heat. Thicker wires like 14AWG or 16AWG carry more current safely than 18AWG options. Pure copper conductors are standard for reliability. Avoid cheap alloys that corrode easily.
Always check the AWG rating before buying. Thicker wires reduce voltage drop ensuring your lights stay bright even under load.
Plug Length and Reach
The length of the lead determines how easily the plug reaches the vehicle socket. Standard 22-inch leads work for most cars but trucks or vans may need 31 inches or more. Consider where the socket is located on your vehicle.
Measure your needs accurately to avoid stretching wires tight which can cause breakage over time.
Connector Material and Durability
The connector housing protects electrical contacts from water and debris. Look for corrosion-resistant brass or tinned terminals. Rubber molded plugs offer better waterproofing than cheap plastic ones.
Prioritize brass terminals and rubber housings for long-term durability in wet weather.
Split Wire vs Bonded Design
Split wire designs allow individual wires to run to each taillight. This eliminates the need for jumper wires across the axle. Bonded wires are simpler but require additional splicing for dual lights.
Choose split wire for easier installation and cleaner wiring on standard utility trailers.
Color-Coding and Standards
Proper color-coding ensures you connect tail brake and turn signals correctly. Look for products adhering to SAE standards. This reduces the risk of electrical shorts or misfiring lights.
Verify the wire colors match your vehicle and trailer wiring diagrams before installation.
Dust Cover and Protection
A dust cover shields the pins when not connected preventing corrosion. Some plugs include rubber covers which are more durable than basic plastic ones. This adds minimal cost but significant protection.
Ensure the plug comes with a cover to keep moisture out during storage.
Installation Ease and Tools
Pre-stripped wires save time and effort. Look for products that allow simple crimping or splicing. Complex wiring kits might require special tools which adds to the total cost of the upgrade.
Choose models with pre-stripped ends to simplify the installation process significantly.
Brand Reputation and Warranty
Trusted brands often provide better quality control and customer support. Check user reviews for real-world durability feedback. Some manufacturers offer warranties that cover defects or early failure.
Stick with well-reviewed brands to ensure you get a reliable product backed by support.
How to Use and Care for Your 5 Way Flat Trailer Wiring Harness Plug
Start by unplugging the old harness if replacing one. Inspect the wiring for fraying or corrosion and replace damaged sections. Clean the existing vehicle socket with electrical contact cleaner to ensure a fresh connection.
Attach the new plug securely using crimp connectors if needed. Ensure the color-coded wires match your trailer lights correctly before plugging in. Test all lights including brakes and turn signals before driving.
Store the plug with the dust cover on when not in use. Avoid exposing it to direct sunlight or harsh chemicals that might degrade the rubber. Check connections periodically to maintain reliable electrical contact.
Frequently Asked Questions
What is the difference between 4-way and 5-way trailer plugs?
A 4-way plug supports tail lights brake lights and turn signals. A 5-way plug adds a dedicated wire for reverse lights. Choose 5-way if your trailer has reverse lights.
How do I know if my vehicle has a 5-way socket?
Look for a 5-pin female socket on the back of your vehicle. It typically has a flat shape with five prongs. If unsure check your owner's manual or inspect the existing plug.
Can I splice a new plug onto an existing wire?
Yes you can splice a new plug if the old one is damaged. Strip the old wires and use crimp connectors to join the new ones securely. Ensure connections are insulated to prevent shorts.
Why is my trailer light not working after installation?
Check if the ground wire is properly connected to the frame. Loose connections or corroded pins often cause failures. Verify all wire colors match your trailer's wiring diagram.
Are these plugs waterproof?
Most plugs are water-resistant but not fully submersible. Use a dust cover when not in use to minimize exposure to moisture. Rubber seals help protect internal contacts from corrosion.
Do I need a wiring harness for every trailer?
Every trailer needs a connector to function safely with your vehicle. If the original harness is broken replacing it ensures reliable lights. It is essential for legal compliance and safety.
How often should I replace my wiring harness?
Inspect it annually or whenever you notice flickering lights. Replace it if you see rust or cracks. Quality plugs can last years with proper care and storage.
Final Thoughts on Choosing the Best 5 Way Flat Trailer Wiring Harness Plug
We reviewed ten top-rated harnesses to help you find the right fit for your vehicle. From budget-friendly options to premium long-lead kits each product offers unique benefits for different towing needs.
Prioritize wire gauge and connector durability to ensure long-lasting performance. Choose a length that reaches comfortably without stretching to avoid future damage to your wiring system.
Remember that prices fluctuate frequently so always verify current costs before purchasing. Check the final price and availability to ensure you get the best deal on your chosen harness.