5 Way Flat Trailer Wiring Harness Plug,22 inch
4.6Editor score
18AWG wire gauge standard
Corrosion resistant brass material
Simple flat plug connector design
In this guide
Finding a reliable 5 way flat trailer wiring harness plug is essential for safe towing. A quality harness ensures your lights function correctly while protecting against corrosion and weather damage during long trips.
We evaluated ten top-rated products based on durability, wire gauge, and ease of installation. Our selection includes options for marine trailers, utility haulers, and standard recreational vehicles with varying wire lengths.
Each pick highlights key features like split wire designs or ergonomic grips to help you choose the right fit. Please note that specific product availability and pricing may change over time on retailer sites.
Top 3 Picks for Best 5 Way Flat Trailer Wiring Harness Plug
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
Nilight 5 Way Flat Trailer Wiring Harness Plug 22inch Wire
4.9Editor score
Heavy duty 18 gauge wires
Rubber insulated durable housing
Color coded wire identification
Top 10 Best 5 Way Flat Trailer Wiring Harness Plug in 2026 Compared
The following table compares key specifications across all ten selected harness plugs to help you find the perfect fit for your specific towing needs.
ProductsSpecificationsEditor scorePrice
Editor's Choice
Oyviny 5 Way Flat Trailer Wiring Harness Plug
22 inch wire length
18AWG wire gauge
Brass tin plated terminals
Dust cover included
4.6Editor score
Editor's Choice
RED WOLF 5-Way Flat Trailer Wire Harness
22 and 31 inch length
18 AWG color coded
Male and female connector
Heavy duty bonded loop
4.7Editor score
Best Premium
Oyviny 5 Way Flat Trailer Wire Extension
48 inch wire extension
18 gauge wire type
Universal 5 way socket
Rubber molded connector
4.7Editor score
5 Pin Trailer Connector 14AWG Pure Copper Wire
25 inch harness length
14AWG pure copper wire
Split wire design feature
PVC insulation included
4.2Editor score
Oyviny 4 Pin 5 Wire Trailer Wiring Harness
18 inches short length
16AWG pure copper wire
Y Split design feature
Ergonomic anti slip tabs
4.9Editor score
5 Way Flat Trailer Wiring Harness Plug,22 inch
22 inch product size
18AWG wire gauge
Brass tinned terminals
Standard flat plug design
4.6Editor score
5 Way Trailer Connector Wire 40 inch Jacketed Cable
40 inch wire tail
18AWG wire gauge
Black cable protective sleeve
Clips for better grip
4.3Editor score
CURT 58550 Vehicle-Side and Trailer-Side
72 inch wire lead
16 gauge wire size
Black molded rubber housing
Ergonomic easy grip
4.7Editor score
Nilight 5 Way Flat Trailer Wiring Harness Plug 22inch Wire
22 inch wire length
18 gauge wire type
Pure copper terminals
300V rated voltage
4.9Editor score
Oyviny Vehicle-Side 5 Way Flat Trailer Wiring Harness
31 inch wire loop
SAE J1128 compliant
Bonded wire durability
Brass terminals included
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
18AWG wire gauge
Split wire design
Brass terminals
The Oyviny 5 Way Flat Trailer Wiring Harness Plug stands out as a top choice for reliable towing connections. With a 4.6 rating it offers a balanced mix of durability and ease of use for most trailer owners.
Pros
- High quality durable construction
- Easy pre stripped installation
- Effective dust cover protection
- Good conductivity pure copper
- Ergonomic plug tabs
Cons
- Wire length may vary
- Standard plastic housing
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Its split wire design allows you to run wires directly to each taillight without needing jumper wires across the axle. The pre stripped 18AWG wires and color coded bonding make installation straightforward even for beginners.
While the 22 inch wire lead is standard some users might need more length for larger setups. The plastic housing is durable but may not withstand extreme off road impacts as well as reinforced rubber options.
This harness is perfect for RV and boat owners who need a reliable plug for their hydraulic brake systems. Its ergonomic design ensures a secure grip when connecting and disconnecting the trailer frequently.
Split Wire Design for Cleaner Installations
The split wire feature eliminates the need for cross axle wiring making your trailer setup look professional and reducing potential points of failure.
Durable Weather Protection
The included dust cover and corrosion resistant terminals ensure your connection stays clean and dry during storage or harsh weather conditions.
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2. RED WOLF 5-Way Flat Trailer Wire Harness – 5 Way Flat Trailer Wiring Harness Plug
RED WOLF 5-Way Flat Trailer Wire Harness
22 and 31 inch length
18 AWG color coded
Male female connector
Bonded loop wire
The RED WOLF harness is unique because it provides both male and female connectors in one package. This makes it ideal for extending existing setups or replacing damaged sockets on both the vehicle and trailer sides.
Pros
- Includes both male and female ends
- Longer female extension cable
- Heavy duty bonding wire
- Wide range of applications
- Easy pre stripped splice
Cons
- Requires splicing for vehicle end
- Slightly higher price point
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With a 22 inch male and 31 inch female lead this kit offers flexibility for routing wires inside a vehicle trunk or van. The heavy duty bonded loop wire ensures a strong connection that resists snapping over time.
Installation requires splicing into the vehicle system which might be challenging for those without experience. The higher price reflects the dual nature of the kit but may not be necessary for simple trailer side replacements.
Choose this kit if you need to extend a connection deeply into a vehicle or replace both ends of a faulty harness. It is robust and well suited for diverse applications including cargo trailers and boats.
Complete Kit with Dual Connectors
Having both male and female plugs in one purchase simplifies complex wiring tasks where both ends of the connection need replacement or extension.
Extended Female Lead Length
The longer female extension provides extra reach for vehicles where the socket is located deep inside a trunk or cargo area.
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3. Oyviny 5 Way Flat Trailer Wire Extension – 5 Way Flat Trailer Wiring Harness Plug
Oyviny 5 Way Flat Trailer Wire Extension
48 inch wire extension
18 gauge wire type
Universal 5 way socket
Rubber molded connector
This Oyviny extension offers a generous 48 inch length providing significant flexibility for difficult vehicle setups. It is rated highly for its robust rubber molded connectors that protect against water and debris.
Pros
- Extra long 48 inch loop
- Universal fit for 5 way plugs
- Rubber molded waterproof housing
- Ready to splice installation
- Color coded wiring system
Cons
- Bulkier due to extra length
- Coiled storage requires space
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The 48 inch loop allows you to route wires safely from the trunk or back of a van without tension on the connection. The universal design ensures compatibility with any standard 5 way plug and vehicle socket.
Storing the extra length might require some coiling or careful routing to avoid tangling in tight spaces. The rubber housing is thicker which adds durability but makes the plug slightly larger than others.
Ideal for owners of vans or vehicles with rear mounted electrical systems this extension ensures you can reach the socket easily. Its waterproof construction makes it a reliable choice for marine or off road use.
Extra Long Routing Flexibility
The 48 inch wire loop is perfect for vehicles where the electrical port is far from the hitch point requiring extra cable length for safe routing.
Rubber Molded Durability
The rubber mold on the connector housing provides enhanced waterproofing and impact resistance for harsher towing environments.
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4. 5 Pin Trailer Connector 14AWG Pure Copper Wire – 5 Way Flat Trailer Wiring Harness Plug
5 Pin Trailer Connector 14AWG Pure Copper Wire
25 inch harness length
14AWG pure copper wire
Split wire design feature
PVC insulation included
This connector uses thicker 14AWG pure copper wire which offers superior conductivity compared to standard 18AWG options. It is designed for users who want maximum stability and minimal resistance in their electrical system.
Pros
- Thick 14AWG pure copper wire
- Superior conductivity and stability
- Clear color coded wire functions
- Stable connection in all weather
- Split design for taillights
Cons
- Higher gauge wire may be stiff
- Shorter length than some options
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The split wire design allows direct connections to taillights simplifying the wiring process. The PVC insulation resists abrasion and aging ensuring the wires remain intact even with frequent movement or rough roads.
The thicker wire might be slightly stiffer making it harder to bend in very tight spaces. The 25 inch length is adequate for most setups but might not reach vehicles with deeply recessed sockets.
Choose this plug if you prioritize electrical performance and durability over flexibility. It is an excellent choice for heavy utility trailers or ATVs that demand reliable power under demanding conditions.
Thicker Wire for Better Flow
The 14AWG pure copper wire ensures minimal voltage drop and provides a more stable electrical connection for lighting systems.
Robust Insulation
Thick PVC insulation protects the wires from physical damage and environmental wear extending the life of your harness.
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5. Oyviny 4 Pin 5 Wire Trailer Wiring Harness – 5 Way Flat Trailer Wiring Harness Plug
Oyviny 4 Pin 5 Wire Trailer Wiring Harness
18 inches short length
16AWG pure copper wire
Y Split design feature
Ergonomic anti slip tabs
Although listed as a 4 pin harness this product receives high praise for its build quality and ease of use. The 46AWG copper wires provide excellent conductivity and the Y split design simplifies connecting both taillights.
Pros
- High rating for reliability
- 16AWG pure copper wire quality
- Ergonomic grip tabs included
- Y split design for taillights
- Protective rubber dust cover
Cons
- Short 18 inch wire length
- 4 pin flat design limits function
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The ergonomic anti slip tabs on the plug make it easy to grip and remove even in cold or wet conditions. A rubber dust cover protects the connection from dirt and moisture when the trailer is not in use.
The 18 inch length is very short which restricts installation to vehicles with rear mounted sockets close to the hitch. Also as a 4 pin plug it may not support all functions required by larger 5 way systems.
This harness is perfect for small utility trailers or boats with simple lighting needs. Its high rating indicates users appreciate its reliability and thoughtful design features like the anti slip tabs and dust cover.
Ergonomic Design Features
The anti slip tabs on the plug body provide a secure grip making it easy to connect and disconnect the harness safely.
High Conductivity Copper
16AWG pure copper wire ensures efficient power transmission to your lights reducing the risk of dimming or failure.
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6. 5 Way Flat Trailer Wiring Harness Plug,22 inch – Best Budget 5 Way Flat Trailer Wiring Harness Plug
5 Way Flat Trailer Wiring Harness Plug,22 inch
22 inch product size
18AWG wire gauge
Brass tinned terminals
Standard flat plug design
This option offers excellent value for those needing a standard replacement plug without extra features. It is highly rated for its simple reliability and use at an accessible price point for general towing needs.
Pros
- Affordable price point option
- Standard 22 inch length
- Corrosion resistant terminals
- Good conductivity performance
- Simple and reliable design
Cons
- Basic plastic housing
- No split wire feature
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The brass tinned terminals ensure a good connection that resists corrosion over time. The 18AWG wires meet standard expectations for light duty trailers providing adequate power for tail lights and signals.
Lack of a split wire design means you may need extra jumper wires for taillights. The housing is basic plastic which works well but is less durable than rubber options in harsh conditions.
Ideal for budget conscious owners with standard cargo or utility trailers this plug gets the job done. It is a practical choice when you need a straightforward replacement without spending extra money.
Affordable Reliable Replacement
This plug provides a cost effective solution for replacing worn out wiring harnesses without sacrificing essential performance features.
Corrosion Resistant Terminals
Brass tinned terminals help prevent rust and ensure a consistent electrical connection even after exposure to moisture.
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7. 5 Way Trailer Connector Wire 40 inch Jacketed Cable – 5 Way Flat Trailer Wiring Harness Plug
5 Way Trailer Connector Wire 40 inch Jacketed Cable
40 inch wire tail
18AWG wire gauge
Black cable protective sleeve
Clips for better grip
This harness features a 40 inch wire tail covered by a black protective sleeve. This sleeve protects the wires from abrasion and gives the setup a cleaner more integrated look than exposed wires.
Pros
- Extra long 40 inch cable
- Black protective cable sleeve
- Clips for secure grip
- Good conductivity terminals
- Cleaner look with sleeve
Cons
- Sleeve may add stiffness
- Sleeve clips not robust
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The extra length provides ample room for routing in vans or large vehicles. The clips on the plug help provide a better grip when plugging in which is a thoughtful design touch for usability.
The sleeve might add some stiffness to the wire making it slightly harder to route around sharp corners. The grip clips are plastic and may break under excessive force over time.
Choose this option if you need extra length and prefer a neater appearance for your wiring. It is well suited for utility trailers or boats where long runs are common and aesthetics matter.
Protective Cable Sleeve
The black sheath covers the wires protecting them from damage and giving your trailer wiring a more professional finished look.
Extended Wire Length
A 40 inch wire tail offers significant flexibility for routing power to the rear of larger vehicles or complex trailer setups.
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8. CURT 58550 Vehicle-Side and Trailer-Side – 5 Way Flat Trailer Wiring Harness Plug
CURT 58550 Vehicle-Side and Trailer-Side
72 inch wire lead
16 gauge wire size
Black molded rubber housing
Ergonomic easy grip
The CURT harness stands out with its massive 72 inch wire lead offering maximum flexibility for installation. It is rated highly for its durable rubber housing and ergonomic design that simplifies connection tasks.
Pros
- Very long 72 inch lead
- Durable molded rubber housing
- Easy grip ergonomic tabs
- Matches industry standard plugs
- Ready to splice installation
Cons
- Long wires may be cumbersome
- Heavier and bulkier options
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The molded rubber housing resists rust and corrosion effectively. The ergonomic tabs make it easy to grip even with gloves on which is helpful when working in tough weather conditions.
Managing 72 inches of wire might require careful coiling to avoid tangles. The bulkier design is sturdy but could be cumbersome to store in tight spaces compared to slim plastic options.
Ideal for large vans or trucks where the socket is far away this harness is a top choice. It balances durability with ease of use making it a reliable partner for any towing setup.
Maximum Wire Flexibility
The 72 inch wire lead ensures you can reach the vehicle socket comfortably even in large vehicles with deep storage areas.
Durable Rubber Housing
Black molded rubber protects the internal components from water and corrosion ensuring long term reliability and safety.
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9. Nilight 5 Way Flat Trailer Wiring Harness Plug 22inch Wire – Best Premium 5 Way Flat Trailer Wiring Harness Plug
Nilight 5 Way Flat Trailer Wiring Harness Plug 22inch Wire
22 inch wire length
18 gauge wire type
Pure copper terminals
300V rated voltage
With a near perfect rating this Nilight plug is a favorite among users for its robust build quality. It features heavy duty 18 gauge wires and an excellent weatherproof sheath that resists damage.
Pros
- Highest user rating product
- Heavy duty 18 gauge wires
- Excellent weatherproof sheathing
- High voltage rated performance
- Easy color coded wiring
Cons
- Standard length limit
- Slightly higher cost
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The blunt cut color coded wires make it easy to identify each function quickly. The 300V rating indicates strong performance capabilities suitable for demanding electrical loads without degradation.
The 22 inch length is standard which limits its use to rear mounted sockets. While the price is higher the superior materials and rating justify the cost for those seeking premium reliability.
Choose this harness for marine or heavy duty towing where weather resistance is critical. Its top rating reflects consistent performance and durability that users appreciate in their daily hauling.
Superior Weather Resistance
The abrasion proof cable sheath and pure copper terminals ensure the plug withstands harsh weather and tough use effectively.
High Performance Rating
Rated at 300V this plug handles electrical loads efficiently reducing the risk of voltage drop during operation.
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10. Oyviny Vehicle-Side 5 Way Flat Trailer Wiring Harness – 5 Way Flat Trailer Wiring Harness Plug
Oyviny Vehicle-Side 5 Way Flat Trailer Wiring Harness
31 inch wire loop
SAE J1128 compliant
Bonded wire durability
Brass terminals included
This harness is designed for the vehicle side featuring a female plug connector that splices into existing wiring. It offers a 31 inch wire loop providing extra reach for difficult vehicle socket locations.
Pros
- Female plug for vehicle side
- 31 inch extra wire loop
- SAE J1128 compliance
- Ergonomic tabs on plug
- High quality brass terminals
Cons
- Female end limits versatility
- Standard design features
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Compliance with SAE J1128 interface specifications ensures a standard and safe connection. The ergonomic tabs offer a better grip when plugging in or unplugging improving usability in tough conditions.
Since it is a female connector it is specific to vehicle side use limiting versatility compared to dual sided options. The 31 inch loop is useful but might still require careful routing in tight vehicles.
Ideal for replacing worn vehicle sockets this plug ensures a reliable connection to your trailer. Its high rating reflects satisfaction with its quality and ease of installation for standard vehicle wiring systems.
Vehicle Side Specific Design
This female plug is designed specifically for vehicle side wiring ensuring compatibility with standard trailer male connectors.
Interface Compliance
Meeting SAE J1128 standards guarantees a consistent and safe electrical interface between your vehicle and trailer.
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Buying Guide – How to Choose the Best 5 Way Flat Trailer Wiring Harness Plug
Choosing the right harness plug requires attention to wire gauge, length, and connector durability for safe towing.
Wire Gauge and Material
Wire gauge determines how much power can pass through safely. Look for 18AWG or lower for standard lighting needs while pure copper material ensures better conductivity than aluminum or copper clad alternatives.
Prioritize pure copper wires with proper insulation for reliable electrical performance over time.
Connector Housing Material
The housing protects internal terminals from water and physical impacts. Rubber molded housings generally offer better waterproofing and durability compared to basic plastic shells in harsh environments.
Select rubber or reinforced materials to ensure longevity and safety in all weather conditions.
Wire Length
Wire length must match the distance between your hitch and vehicle socket. Longer leads like 48 or 72 inches offer flexibility for large vans while 22 inches suits standard pickup trucks.
Measure your routing path before buying to ensure the lead reaches comfortably without tension or excess slack.
Terminal Protection
Terminals are prone to corrosion which can cause signal loss. Plated brass terminals resist rust better than raw metal and often come with dust covers for added protection during storage.
Always choose terminals with anti corrosion plating to maintain a clean electrical connection.
Split vs Bonded Wire
Split wire harnesses allow you to run power directly to each taillight reducing the need for jumper wires. Bonded wires stay together which simplifies routing but may require splicing for separate lights.
Consider split wires if your taillights are widely spaced or you want a cleaner installation.
Ergonomic Features
Features like grip tabs on the plug make it easier to connect and disconnect especially when wearing gloves. This design choice improves usability during cold or wet conditions.
Look for plugs with added grip elements to improve handling in any situation.
Universal Compatibility
Ensure the plug matches the 5 way flat industry standard used by most vehicles and trailers. Compatibility ensures you can connect to any tow vehicle without needing extra adapters.
Check product descriptions for universal fit confirmation before purchasing.
Voltage Rating
A high voltage rating such as 300V ensures the harness can handle the electrical load safely. This prevents overheating or failure under heavy use conditions.
Verify that the voltage rating meets or exceeds standard trailer lighting requirements.
How to Use and Care for Your 5 Way Flat Trailer Wiring Harness Plug
When installing always match color coded wires to the correct functions like tail, brake, and turn signals. Use wire strippers and crimp connectors for secure joints if splicing into existing cables.
After each trip inspect the plug for any signs of wear or moisture ingress. Clean the terminals gently with a dry cloth to prevent debris from interfering with the electrical connection.
Store the plug with the dust cover on to protect it from dirt and moisture during periods of non use. Proper maintenance will extend the lifespan of your harness significantly.
Frequently Asked Questions
What are the standard wire color codes for a 5 way flat connector?
Standard codes include brown for tail lights, green for right turn/brake, yellow for left turn/brake, blue for brake controller electric brakes, and white for ground. Always verify colors on the specific harness you buy as variations exist.
Can I use a 5 way flat harness on a vehicle with a 4 pin socket?
You will need an adapter to connect a 5 way male plug to a 4 pin female socket. Ensure the adapter supports all the functions you need including brake controller signals if required by your trailer.
How do I know if I need a male or female connector?
Trailer ends typically use male plugs with exposed pins while vehicle ends use female sockets with holes. If you are replacing the trailer end get a male plug and if replacing vehicle wiring use a female connector.
Why do trailer lights flicker when braking?
Flickering usually indicates a poor ground connection or corroded terminals. Check that the white ground wire is securely attached to bare metal and clean any corrosion on the plug pins.
Is it better to buy a pre-made harness or wire it myself?
Pre made harnesses save time and ensure correct color coding which reduces errors. DIY wiring allows customization but requires electrical knowledge and quality tools to maintain safety standards.
How often should I replace my trailer wiring harness?
Inspect your harness annually for cracks in insulation or corrosion on pins. Replace the entire harness if you notice broken wires or if lights stop functioning consistently despite checking fuses and bulbs.
Final Thoughts on Choosing the Best 5 Way Flat Trailer Wiring Harness Plug
We highlighted the Oyviny model as a top choice for its split wire design and durability while the Nilight plug earned premium status for its weather resistance. Budget seekers can trust the affordable yet solid standard options available.
Prioritize pure copper wires and robust housing materials to ensure your lights function reliably during every trip. Longer wire lengths are worth the investment if your vehicle setup requires extra routing flexibility.
Remember to check current availability and pricing on retailer sites as these details can change quickly. A quality harness is a small investment that ensures safety and peace of mind on the road.