5 Way Flat Trailer Wiring Harness Plug 22 inch 18AWG
4.6Editor score
22 inch cable length
18AWG wire gauge
Corrosion resistant brass
Standard 5 flat plug
In this guide
Finding the right trailer wiring is essential for safe towing. A good 5 Way Flat Trailer Wiring Harness Plug ensures your lights function correctly and meets legal requirements for road use every single time.
We compared ten top-rated models based on durability, wire gauge, connector quality, and ease of installation. This list covers various lengths and styles to help you match your specific vehicle and trailer needs.
Each pick shows key specs, pros, and cons so you can decide quickly. Prices change often so check the current links before buying to ensure you get the best value available right now.
Top 3 Picks for Best 5 Way Flat Trailer Wiring Harness Plug
Oyviny 5 Way Flat Trailer Wire Extension 48 inch
4.7Editor score
48 inch extra length
Universal 5 way socket
Color coded bonded wires
Rubber molded connector
CURT 58550 Vehicle-Side and Trailer-Side 5-Pin Flat Wiring Harness
4.7Editor score
72 inch wire leads
16 gauge heavy wires
Molded rubber housing
Ergonomic grip tabs
Top 10 Best 5 Way Flat Trailer Wiring Harness Plug in 2026 Compared
The following table provides a side-by-side comparison of all ten selected products. Review the key specifications for each model to find the exact match for your towing setup and electrical system requirements.
ProductsSpecificationsEditor scorePrice
Best Budget
Oyviny 5 Way Flat Trailer Wiring Harness Plug
22 Inch Wire Lead
18AWG Pure Copper
Tin Plated Terminals
Dust Cover Included
4.6Editor score
Editor's Choice
RED WOLF 5-Way Flat Trailer Wire Harness
22 and 31 Inch
18 AWG Cable
Male Female Pair
Heavy Duty Bonded
4.7Editor score
Editor's Choice
Oyviny 5 Way Flat Trailer Wire Extension 48 inch
48 Inch Extension
18 Gauge Wire
Male Female Ends
Rubber Molded
4.7Editor score
5 Pin Trailer Connector 14AWG Pure Copper Wire 25 Inch
25 Inch Length
14AWG Pure Copper
Split Wire Design
Dust Cover Included
4.2Editor score
Oyviny 4 Pin 5 Wire Trailer Wiring Harness
18 Inches Length
16AWG Pure Copper
Y Split Design
Ergonomic Tabs
4.9Editor score
5 Way Flat Trailer Wiring Harness Plug 22 inch 18AWG
22 Inch Length
18AWG Wire Gauge
Brass Terminals
5 Way Flat Plug
4.6Editor score
5 Way Trailer Connector Wire 40 inch Jacketed Cable
40 Inch Length
18AWG Wire Gauge
Black Sheathing
Brass Terminals
4.3Editor score
CURT 58550 Vehicle-Side and Trailer-Side 5-Pin Flat Wiring Harness
72 Inch Length
16 Gauge Wires
Molded Rubber
Color Coded Wires
4.7Editor score
Nilight 5 Way Flat Trailer Wiring Harness Plug
22 Inch Length
18 Gauge Wires
Pure Copper Terminals
Heavy Duty Sheath
4.9Editor score
Oyviny Vehicle-Side 5 Way Flat Trailer Wiring Harness Female Plug
31 Inch Length
Brass Terminals
Rubber Dust Cover
SAE J1128
4.7Editor score
1. Oyviny 5 Way Flat Trailer Wire Extension 48 inch – Best Overall 5 Way Flat Trailer Wiring Harness Plug
Oyviny 5 Way Flat Trailer Wire Extension 48 inch
48 Inch Length
18 Gauge Wires
Male Female Ends
Rubber Molded
This Oyviny harness stands out with a robust 48 inch length that simplifies complex installations. It holds a solid 4.7 rating thanks to its universal design and durable rubber molded connectors that resist wear over time.
Pros
- Extra length for easy routing
- Universal socket compatibility
- Durable rubber construction
- Clear color coding
- Plug and play install
Cons
- May need trimming
- Price slightly higher
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The 18 gauge color coded wires ensure you can quickly identify ground lights brake and signal lines during setup. The bonded construction prevents wire separation while the male and female ends allow versatile usage for either vehicle or trailer side mounting.
While the length is excellent for reach it might require trimming for shorter applications. The price is also marginally higher than basic models but the durability and flexibility justify the investment for frequent users.
Buy this if you need reliable extra reach and a plug and play solution that fits most trailers. It remains a top choice for anyone prioritizing longevity and ease of use on the road.
Versatile Installation Options
The dual male and female ends allow you to splice into existing wiring or use as a direct extension for added flexibility.
Durable Weather Resistance
Rubber molded connectors keep moisture out ensuring your electrical connections stay secure during rain or wet road conditions.
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2. 5 Way Flat Trailer Wiring Harness Plug 22 inch 18AWG – Best Value 5 Way Flat Trailer Wiring Harness Plug
5 Way Flat Trailer Wiring Harness Plug 22 inch 18AWG
22 Inch Length
18AWG Wire Gauge
Brass Terminals
5 Way Flat Plug
This model offers an excellent entry level option for trailer owners needing a reliable connection without breaking the bank. It maintains a strong 4.6 rating by delivering standard functionality at a highly competitive price point for budget conscious shoppers.
Pros
- Affordable price point
- Standard 22 inch length
- Corrosion resistant brass
- Easy plug connection
- Wide utility application
Cons
- Shorter wire length
- Basic plastic housing
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The 18AWG wire gauge provides adequate conductivity for most lighting needs while the brass terminals resist rust in outdoor conditions. The 22 inch length is standard for most direct replacements making it a convenient choice for quick fixes on trailers and utility vehicles.
The main tradeoff is the shorter length which may not suit complex routing paths. Additionally the housing is basic compared to premium rubber options but this does not impact core electrical performance significantly.
Choose this for simple replacement jobs where cost efficiency matters most. It is an ideal pick for occasional users who need a dependable plug that fits standard 5 way sockets effectively.
Cost Effective Solution
Get reliable electrical connectivity without overspending on features you may not need for basic trailer lighting requirements.
Standard Compatibility
Designed to fit standard vehicle side 5 pin female sockets ensuring immediate compatibility with most trailer setups available today.
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3. CURT 58550 Vehicle-Side and Trailer-Side 5-Pin Flat Wiring Harness – Best Premium 5 Way Flat Trailer Wiring Harness Plug
CURT 58550 Vehicle-Side and Trailer-Side 5-Pin Flat Wiring Harness
72 Inch Length
16 Gauge Wires
Molded Rubber
Color Coded Wires
The CURT 58550 sets a high standard with 72 inch leads and 16 gauge wires that handle power needs exceptionally well. With a 4.7 rating it is praised for its ergonomic grip tabs and durable black molded rubber housing that resists rust and corrosion.
Pros
- Extra long 72 inch wires
- Heavier 16 gauge wire
- Durable molded rubber
- Ergonomic grip tabs
- Industry standard design
Cons
- Higher price tier
- May be too long
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The heavier wire gauge ensures stable signal transmission even in longer runs. The industry standard 5 pin design matches most boat and utility trailers seamlessly. Color coded wires make installation straightforward even for less experienced DIYers.
Premium pricing reflects the superior build quality but longer lengths might be unnecessary for small setups. The molded rubber is excellent but can be slightly stiffer than thinner options in cold weather handling.
Select this premium model for heavy duty towing where reliability and wire thickness are priorities. It is perfect for boat owners or those who frequently tow heavy loads requiring robust electrical connections.
Heavy Duty Wire Quality
Thicker 16 gauge wires reduce resistance and ensure bright lights even over longer distances between vehicle and trailer.
Superior Connector Durability
Black molded rubber housing provides exceptional protection against physical impact and environmental exposure compared to plastic alternatives.
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4. Oyviny 5 Way Flat Trailer Wiring Harness Plug 22 Inch – Reliable Connector
Oyviny 5 Way Flat Trailer Wiring Harness Plug 22 Inch
22 Inch Wire Lead
18AWG Pure Copper
Tin Plated Terminals
Dust Cover Included
This Oyviny harness brings solid build quality with pure copper wires that deliver good conductivity for all light functions. It scores a 4.6 rating by offering a dust cover that protects against moisture when not in use.
Pros
- Pure copper conductivity
- Dust cover included
- Split wire design
- Color coded wiring
- Ergonomic tab grip
Cons
- Standard length only
- Tin plating may wear
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The split wire design allows direct routing to taillights eliminating extra jumper wires. Pre stripped ends simplify the splicing process significantly. Ergonomic tabs on both sides of the plug make connecting and disconnecting easier even with gloves.
While durable the tin plated terminals might need occasional maintenance in harsh salt water environments. The standard length limits flexibility for complex setups where extra reach is beneficial.
Recommend this for standard replacements needing extra corrosion protection via the dust cover. It balances performance and convenience well for most RV and boat owners.
Split Wire Advantage
Separate wires for each taillight reduce clutter and simplify routing across the trailer frame efficiently.
Protective Dust Cover
Keep water and dust out of the socket when unplugged to extend the overall lifespan of your connector.
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5. RED WOLF 5-Way Flat Trailer Wire Harness – Dual Pair Kit
RED WOLF 5-Way Flat Trailer Wire Harness
22 and 31 Inch
18 AWG Cable
Male Female Pair
Heavy Duty Bonded
RED WOLF provides a complete solution with both male and female cables in one pack. This model earns a 4.7 rating because the female lead extends to 31 inches allowing you to mount your connector deeper inside the vehicle trunk.
Pros
- Includes male and female pair
- Longer female lead
- Heavy duty bonded wires
- Wide marine application
- Tinned terminals
Cons
- Male is shorter
- Slightly bulkier
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The 18 AWG bonded wires are designed to stay together during splicing and routing. Corrosion resistant brass and tinned terminals offer lasting conductivity even in harsh marine conditions like salt water towing.
The male cable is shorter at 22 inches which may limit flexibility if you need equal lengths on both sides. It also weighs more than single plugs due to the dual pack inclusion.
Buy this if you need to hide your vehicle connector safely in the trunk and reach out to the hitch. The dual pack eliminates the need to buy two separate parts later.
Trunk Mounting Ready
The longer female cable allows secure internal mounting keeping the socket protected from road debris and weather exposure.
Complete Kit Convenience
Get both ends you need in one order saving time and ensuring compatible quality for both vehicle and trailer connections.
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6. 5 Pin Trailer Connector 14AWG Pure Copper Wire 25 Inch – Heavy Gauge Wire
5 Pin Trailer Connector 14AWG Pure Copper Wire 25 Inch
25 Inch Length
14AWG Pure Copper
Split Wire Design
Dust Cover Included
This connector stands out with 14AWG pure copper wires that are significantly thicker than the standard 18 gauge. It holds a 4.2 rating for delivering excellent stability and superior conductivity for lighting systems that demand reliable power delivery.
Pros
- Thick 14AWG wire
- Excellent conductivity
- Split wire routing
- Dust cover included
- Easy installation
Cons
- Lower rating average
- Thick wires harder to strip
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The thick PVC insulation resists abrasion and aging ensuring long term performance in all weather conditions. The split wire design allows direct connection to each taillight making installation cleaner without extra jumper wires.
The stiffer 14AWG wire can be harder to manipulate in tight spaces compared to thinner options. The rating reflects some user feedback regarding rigidity rather than performance issues.
Choose this if your trailer has high load lighting requirements or longer runs. The extra wire thickness ensures no voltage drop even under demanding electrical loads.
Superior Electrical Flow
Thicker 14AWG copper wire reduces resistance ensuring your trailer lights stay bright during extended towing trips.
Cleaner Cable Routing
Separate wires mean you can run each directly to the taillight avoiding messy cross wiring on the trailer frame.
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7. Oyviny 4 Pin 5 Wire Trailer Wiring Harness – Alternative Configuration
Oyviny 4 Pin 5 Wire Trailer Wiring Harness
18 Inches Length
16AWG Pure Copper
Y Split Design
Ergonomic Tabs
Although a 4 pin flat plug this harness uses 5 wires with a Y split for separate taillight runs. It earns an impressive 4.9 rating for its 16AWG pure copper build and ergonomic design that makes plugging in easy.
Pros
- High 4.9 rating
- Y split design
- 16AWG pure copper
- Shorter compact length
- Anti slip tabs
Cons
- 4 pin flat plug
- Short 18 inch length
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The 18 inch length is perfect for short setups where excess wire would create clutter. The Y split design eliminates the need to run a wire across the axle making it ideal for utility trailers with limited space.
Ensure your vehicle has a 4 pin socket since this is not a 5 pin variant. The shorter length limits versatility for larger vehicles but suits compact utility trailers perfectly.
Ideal for boat and utility owners with 4 pin systems needing a high quality upgrade. The pure copper build and anti slip tabs make it a favorite among practical trailer users.
Unique Y Split Layout
Separate wires for each side eliminate axle crossing simplifying wiring on small utility trailers effectively.
Compact Fit Design
Short length prevents wire clutter in tight spaces ensuring a clean installation without excess slack loops.
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8. 5 Way Trailer Connector Wire 40 inch Jacketed Cable – Extended Reach
5 Way Trailer Connector Wire 40 inch Jacketed Cable
40 Inch Length
18AWG Wire Gauge
Black Sheathing
Brass Terminals
This option features a 40 inch wire tail that offers longer reach than many standard models. It holds a 4.3 rating due to its black protective sleeve that hides the internal wires while maintaining waterproof performance.
Pros
- Long 40 inch wire
- Black protective sheathing
- Concealed wiring
- Corrosion resistant
- Easy clip grip
Cons
- Standard 18AWG gauge
- Basic connector design
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The black sheathing keeps your yellow green brown and white cables protected and concealed. This aesthetic and physical protection helps prevent wear and tear during frequent hookups in rough conditions.
The standard 18AWG gauge is adequate for most lighting but not as robust as thicker copper options. The connector design is basic and lacks some ergonomic tabs found in premium picks.
Select this for setups requiring extra length without needing premium features. The hidden wiring keeps your trailer look clean while protecting the internal electrical system effectively.
Concealed Wiring Aesthetic
Black sheathing hides internal wires ensuring a cleaner look while protecting against physical damage during use.
Extra Length Flexibility
40 inch tail provides ample reach for mounting connectors further back on the vehicle or trailer frame.
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9. Nilight 5 Way Flat Trailer Wiring Harness Plug – Heavy Duty Upgrade
Nilight 5 Way Flat Trailer Wiring Harness Plug
22 Inch Length
18 Gauge Wires
Pure Copper Terminals
Heavy Duty Sheath
Nilight delivers a superior upgrade with a heavy duty sheath that protects against weather and abrasion. It scores a 4.9 rating for reliability and clear color coding that makes identification simple during installation.
Pros
- High 4.9 rating
- Heavy duty sheath
- Pure copper terminals
- Standard 22 inch
- Excellent weatherproofing
Cons
- Short length only
- Price higher than basic
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The pure copper terminals ensure excellent conductivity while the insulating rubber housing resists rust. Rated at 300V and 105°C it handles heat well during operation. The blunt cut wires allow precise trimming for your setup.
The length is standard at 22 inches so verify reach before purchasing. While robust the price point is higher than budget alternatives but quality is consistent with top tier options.
Recommended for those wanting top quality protection and durability. It is an excellent choice for replacing worn out wires that need better weather protection against road elements.
Enhanced Protection
Heavy duty sheath and insulating rubber housing protect internal wires from harsh environmental conditions.
Clear Color Coding
Wires are clearly identified by function reducing installation mistakes and saving time during setup.
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10. Oyviny Vehicle-Side 5 Way Flat Trailer Wiring Harness Female Plug – Female Connector Focus
Oyviny Vehicle-Side 5 Way Flat Trailer Wiring Harness Female Plug
31 Inch Length
Brass Terminals
Rubber Dust Cover
SAE J1128
This harness features a female plug designed to splice into trailer wiring to connect to the vehicle socket. It achieves a 4.7 rating by meeting SAE J1128 interface specifications ensuring industry standard compatibility and safety.
Pros
- Female plug focus
- 31 inch wire lead
- SAE J1128 specs
- Dust cover included
- Ergonomic design
Cons
- Female specific use
- Shorter loop than others
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The 31 inch wire loop provides enough length for flexible routing in many vehicle setups. Brass terminals with a rubber dust cover ensure conductivity and waterproof performance during long term use.
It is specifically designed for vehicle side use so confirm your needs before buying. The ergonomic tabs offer better grip making plugging and unplugging easier in wet conditions.
Ideal for adding a vehicle connector to a trailer or extending existing vehicle harnesses. It fits securely with other standard 5 way plugs ensuring a reliable connection for all towing trips.
Industry Standard Match
SAE J1128 compliance ensures reliable compatibility with standard vehicle and trailer wiring systems.
Secure Connector Mounting
Ergonomic tabs provide better grip ensuring you can easily disconnect connectors even in challenging weather.
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Buying Guide – How to Choose the Best 5 Way Flat Trailer Wiring Harness Plug
Selecting the right wiring harness involves balancing length wire gauge and connector durability. Consider these factors to ensure a safe and efficient electrical connection for your trailer.
Wire Gauge and Conductivity
Wire gauge determines how much current can flow without resistance. Thicker wires like 16AWG or 14AWG handle power better than standard 18AWG especially for longer runs or high load lights.
Choose thicker wire if you have long trailers or heavy lighting to prevent dimming and voltage drops during travel.
Connector Length
Length varies from 18 inches to 72 inches. Short lengths fit compact setups while longer lengths allow routing through vehicle frames or to internal sockets.
Measure your routing path first to ensure the harness reaches without excessive tension or slack.
Material and Durability
Pure copper wires offer better conductivity than aluminum. Brass terminals resist corrosion while molded rubber housing protects against moisture and physical impacts better than plastic.
Prioritize rubber connectors and pure copper for outdoor use especially in salt air or rainy climates.
Plug Type Compatibility
Ensure your vehicle has a 5 pin female socket. Some harnesses come as male or female plugs. Verify which side you need to connect to your vehicle.
Buy the correct gender plug to match your existing vehicle wiring setup.
Weather Protection
Look for dust covers and waterproof sheathing. A cover prevents dirt buildup when unplugged while sheathing protects exposed wires from rain and road spray.
Select models with dust covers to extend lifespan and prevent corrosion in the socket.
Installation Ease
Pre stripped wires save time during splicing. Color coded wires simplify identifying brake signal and ground connections. Ergonomic tabs on plugs help with handling.
Choose pre stripped models to minimize installation time and ensure clean connections.
Budget Considerations
Basic options are affordable while premium models cost more for durable materials. Decide if the extra durability justifies the cost based on usage frequency.
Balance price with expected towing frequency to get the best value.
Split vs Bonded Wires
Split wires run directly to taillights reducing cross wiring. Bonded wires stay together in a bundle which simplifies routing.
Pick split wires for cleaner taillight wiring and bonded for easier routing along the frame.
How to Use and Care for Your 5 Way Flat Trailer Wiring Harness Plug
Install the harness by stripping existing wires and splicing the color coded wires together using crimp connectors or soldering for durability. Secure connections with electrical tape or heat shrink tubing to protect against moisture.
Plug the connector firmly until the side tabs click into place to ensure a secure connection. Test all lights before driving by having a helper check the trailer signals while you operate your vehicle controls.
When not in use store the plug with the dust cover on to prevent dirt buildup. Regularly inspect wires for fraying or corrosion and clean the terminals with a wire brush if needed.
Frequently Asked Questions
What is the difference between a 4 pin and 5 pin trailer plug?
A 4 pin plug handles tail brake and turn signals while a 5 pin adds a reverse light wire. If your trailer has reverse lights you must use a 5 pin connector for full functionality.
Can I use a 5 way harness on a 4 pin socket?
No because the physical shape and pin configuration differ. You need an adapter if your vehicle and trailer use different plug types to ensure proper electrical contact.
Why do my trailer lights flicker?
Flickering often indicates a loose connection or poor ground. Check that all splices are tight and the white ground wire is connected to a clean metal surface on the trailer frame.
How long should a trailer wiring harness be?
Length depends on your vehicle and trailer size. Standard lengths range from 22 to 72 inches. Measure the distance from your vehicle socket to the hitch and add extra slack for routing.
Do I need to solder my trailer wires?
Soldering offers the strongest bond but crimp connectors work well for most users. Ensure all connections are weatherproofed with heat shrink or tape regardless of method used.
How do I test my trailer lights?
Plug the harness into your vehicle and turn on the lights. Have a helper stand behind the trailer to verify brake turn and running lights function correctly before driving.
What gauge wire is best for trailers?
Standard trailers use 18AWG wire which is sufficient for most setups. For long trailers or high power lights upgrade to 16AWG or 14AWG to ensure stable power delivery.
How do I protect my trailer plug from water?
Use a dust cover when the plug is disconnected. Ensure connections are insulated with heat shrink tubing and seal the socket with dielectric grease to repel moisture.
Final Thoughts on Choosing the Best 5 Way Flat Trailer Wiring Harness Plug
The Oyviny 48 inch harness and the CURT 72 inch option stand out for quality and versatility. For budget conscious buyers the standard 22 inch models offer reliable performance without high costs.
Prioritize wire gauge and material durability if you tow frequently or in harsh conditions. A robust connector ensures your lights stay bright and safe on every trip.
Always check the current product links for the most up to date availability. Prices and stock levels change regularly so verify before finalizing your purchase decision.