5 Way Flat Trailer Wiring Harness Plug 22 inch
4.6Editor score
18AWG wire gauge
Corrosion resistant brass
Wide application for trailers
In this guide
Finding a reliable 5 Way Flat Trailer Wiring Harness Plug is essential for safe towing across various vehicle types. These connectors ensure your trailer lights function correctly, allowing brakes and signals to communicate clearly with your tow vehicle during travel on any road.
We evaluated ten top-rated harnesses based on wire quality, connector durability, and installation ease. Our analysis focuses on corrosion resistance, gauge thickness, and design features that simplify setup for both new owners and experienced trailer enthusiasts seeking dependable electrical solutions.
Each pick highlights specific strengths like split wiring or extra length for flexible routing. Prices fluctuate frequently, so always verify current listings before purchasing to ensure you get the best value for your specific trailer wiring needs this season.
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
18AWG pure copper wires
Split wire design for lights
CURT 58550 Vehicle-Side and Trailer-Side
4.7Editor score
72 inch wire lead
Ergonomic grip tabs
Durable black molded rubber
Top 10 Best 5 Way Flat Trailer Wiring Harness Plug in 2026 Compared
This side-by-side comparison highlights key specifications like wire gauge, connector type, and length to help you quickly identify which harness matches your trailer electrical requirements and installation preferences for optimal performance.
ProductsSpecificationsEditor scorePrice
Editor's Choice
Oyviny 5 Way Flat Trailer Wiring Harness Plug
18AWG Pure Copper Wire
22 Inch Length
5 Pin Male Connector
Split Wire Design
4.6Editor score
Editor's Choice
RED WOLF 5-Way Flat Trailer Wire Harness
18AWG Color Coded Wire
22 and 31 Inch
Male and Female Ends
Pre-Stripped Wires
4.7Editor score
Best Premium
Oyviny 5 Way Flat Trailer Wire Extension
18AWG Wire Gauge
48 Inch Extension
Universal 5 Way Socket
Rubber-Molded Connectors
4.7Editor score
5 Pin Trailer Connector 14AWG Pure Copper Wire
14AWG Pure Copper Wire
25 Inch Perfect Length
Split Wire Design
Dust Cover Included
4.2Editor score
Oyviny 4 Pin 5 Wire Trailer Wiring Harness
16AWG Pure Copper Wires
18 Inch Short Length
Y Split Design
Anti-Slip Tab Design
4.9Editor score
5 Way Flat Trailer Wiring Harness Plug 22 inch
18AWG Wire Gauge
22 Inch Length
5 Way Flat Plug
Corrosion Resistant Brass
4.6Editor score
5 Way Trailer Connector Wire 40 inch Jacketed Cable
18AWG Wire Gauge
40 Inch Jacketed Cable
Black Cable Protective Sleeve
Tabs on Both Sides
4.3Editor score
CURT 58550 Vehicle-Side and Trailer-Side
16 Gauge Wires
72 Inch Wire Lead
Ergonomic Connector Design
Durable Black Molded Rubber
4.7Editor score
Nilight 5 Way Flat Trailer Wiring Harness Plug
18 Gauge Heavy Duty Wires
22 Inch Extension Wire
300V Rated Voltage
Rubber Insulated Sheath
4.9Editor score
Oyviny Vehicle-Side 5 Way Flat Trailer Wiring Harness
5 Pin Female Plug
31 Inch Wire Lead
Bonded Wire Design
SAE J1128 Compliant
4.7Editor score
1. Oyviny 5 Way Flat Trailer Wiring Harness Plug – Best Overall Connectivity
Oyviny 5 Way Flat Trailer Wiring Harness Plug
18AWG Pure Copper Wires
22 Inch Wire Lead
5 Pin Male Connector
Split Wire Design Feature
This Oyviny harness delivers reliable connectivity for marine and utility trailers. With a 4.6 rating it stands out for its pure copper conductors and ergonomic design that simplifies daily towing tasks effectively.
Pros
- Pre-stripped color coded wires
- Ergonomic grip tabs included
- Solid dust cover protection
- Direct taillight connection
- Durable brass terminals
Cons
- Shorter wire length option
- No female extension included
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The 18AWG gauge ensures stable power delivery for brake and turn signals. Split wire design eliminates jumper wires allowing direct routing to lights reducing clutter and potential failure points in harsh conditions.
Installation is straightforward thanks to pre-stripped ends and clear color coding. The dust cover adds waterproofing but users note the lead length is shorter than extended options which may limit reach for larger vehicles.
Ideal for owners seeking a balance of quality and simplicity. This harness provides essential protection and conductivity without unnecessary bulk making it a smart choice for frequent recreational towing and light utility work.
Direct Wiring Convenience
Split wire design removes need for cross-axle jumpers simplifying light installation.
Ergonomic Grip
Tabs on both sides improve handling when plugging and unplugging trailer connectors.
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2. RED WOLF 5-Way Flat Trailer Wire Harness – Best Dual Connector Set
RED WOLF 5-Way Flat Trailer Wire Harness
18AWG Color Coded Wire
22 Male 31 Inch Length
Male and Female Ends
Pre-Stripped Bonded Loop
RED WOLF offers a complete solution with both plug and socket in one kit. This flexibility is ideal when vehicle and trailer ends need replacing or extending significantly for diverse towing scenarios.
Pros
- Includes both male and female
- Longer female extension cable
- Wide application range
- Heavy duty bonded loop
- Corrosion resistant terminals
Cons
- Higher price point
- Requires vehicle side splice
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The female end measures 31 inches providing extra reach into vehicle trunks while male end stays compact. Pre-stripped bonded loops facilitate easy splicing into existing wiring without complex cutting.
Construction quality is high with tinned terminals resisting rust over time. However users must splice one end into vehicle wiring which may require basic tools compared to fully pre-made extension kits.
Best suited for those needing adaptable connection points. The set supports marine boat utility and cargo trailers ensuring versatile use across different equipment types without compromising electrical performance.
Flexible Extension
Male and female ends allow custom setups for vehicle trunk or trailer routing.
Bonded Loop Wire
Heavy duty loops simplify splicing into existing vehicle wiring systems securely.
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3. Oyviny 5 Way Flat Trailer Wire Extension – Best Length Option
Oyviny 5 Way Flat Trailer Wire Extension
18AWG Wire Gauge
48 Inch Total Length
Male and Female Ends
Universal 5 Way Socket
This harness provides significant length for routing wires without strain. Its universal socket design fits most trailers and tow vehicles making it a reliable replacement for worn out wiring connections.
Pros
- 48 inches of extra length
- Universal trailer compatibility
- Rubber-molded connectors
- Plug and play installation
- Pure copper wires
Cons
- Thicker cable may need routing adjustment
- Not split wire design
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The 48-inch loop offers ample slack for flexible installation around bumpers and frames. Rubber-molded connectors enhance waterproofing which is crucial for marine or off-road environments prone to moisture exposure.
Installation is simple as it replaces existing harnesses without cutting originals. Pure copper wires ensure conductivity but the non-split design means standard taillight routing remains necessary unlike split options.
Great for owners needing extension without new vehicle wiring. The build quality supports daily use and the extra length helps avoid tension on connections during trailer movement on rough roads.
Extra Slack
48 inch loop reduces tension and simplifies routing around vehicle bumpers.
Rubber Protection
Molded rubber connectors improve waterproofing for harsh weather conditions.
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4. 5 Pin Trailer Connector 14AWG – Best Heavy Gauge
5 Pin Trailer Connector 14AWG Pure Copper Wire
14AWG Pure Copper Wire
25 Inch Length
Split Wire Design
Dust Cover Included
This connector prioritizes durability with thicker 14AWG wires than standard options. Ideal for heavy utility loads it provides enhanced stability against voltage drops during extended towing sessions.
Pros
- Thicker 14AWG conductors
- PVC insulation resists aging
- Separate wires for lights
- Stable power delivery
- Weather resistant coating
Cons
- Heavier bulk compared to others
- Fewer customer reviews
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The split wire design simplifies direct taillight connections without cross wiring. Thick PVC insulation protects against abrasion and corrosion ensuring consistent performance even in dusty or wet environments.
While bulkier than 18AWG versions the extra copper content supports reliable current flow. Installation is easy with color-coded pre-stripped ends but the weight may require careful securing in tight areas.
Best for demanding applications where electrical integrity is paramount. This harness suits ATV utility and cargo trailers needing robust connections that withstand frequent use and rough terrain conditions.
Enhanced Conductivity
14AWG pure copper wires reduce resistance for heavier electrical loads.
PVC Protection
Thick insulation prevents aging and maintains performance in all weather.
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5. Oyviny 4 Pin 5 Wire Trailer Wiring Harness – Best Compact Design
Oyviny 4 Pin 5 Wire Trailer Wiring Harness
16AWG Pure Copper Wires
18 Inch Short Length
Y Split Design
Anti-Slip Tab Design
This harness earns top ratings for compact simplicity and robust wiring. The Y design eliminates axle crossing for a cleaner setup ideal for smaller utility trailers or short light wiring jobs.
Pros
- High 4.9 customer rating
- Y design for both taillights
- Compact short length
- Strong grip tabs
- Pure copper conductors
Cons
- 4 pin plug not 5 pin
- Shorter wire length
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At 16AWG the copper wires offer solid conductivity for standard lighting. Anti-slip tabs on the plug ensure secure handling during connections while the short 18 inch length keeps wiring tidy.
Note this uses a 4 pin flat plug rather than 5 pin so verify compatibility. It suits basic lighting functions without brake or reverse light needs simplifying installation for lightweight trailers.
Perfect for owners wanting minimal bulk and high reliability. This harness delivers efficient performance for standard tow setups where 5 pin functionality is not required or available.
Clean Y Split
Y split design removes need to run wires across the trailer axle.
Secure Grip
Anti-slip tabs make plugging and unplugging easier and faster.
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6. 5 Way Flat Trailer Wiring Harness Plug – Best Value Option
5 Way Flat Trailer Wiring Harness Plug 22 inch
18AWG Wire Gauge
22 Inch Length
5 Way Flat Plug
Corrosion Resistant Brass
This harness offers solid performance at an accessible price. It meets standard 18AWG requirements for reliable lighting control and corrosion resistant terminals prevent common issues in wet environments.
Pros
- Affordable price point
- 18AWG gauge standard
- Corrosion resistant materials
- Standard 5 way plug
- Simple power supply
Cons
- Basic packaging
- No split wire feature
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The 22 inch lead provides decent length for basic extensions. Brass terminals ensure conductivity while the flat plug design fits most vehicle sockets for quick replacement of damaged existing harnesses.
While it lacks split wiring the straightforward design simplifies maintenance and repair. Users appreciate the affordability for occasional towing without sacrificing essential electrical safety or connection stability.
Best for budget conscious buyers needing reliable basics. This harness suits light utility or recreational use where cost efficiency is key alongside dependable function for trailer signal lights.
Cost Efficiency
Affordable price provides reliable performance without unnecessary extra features.
Corrosion Resistance
Brass terminals resist rust for better longevity in humid conditions.
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7. 5 Way Trailer Connector Wire – Best Extended Jacketed Cable
5 Way Trailer Connector Wire 40 inch Jacketed Cable
18AWG Wire Gauge
40 Inch Wire Tail
Black Protective Sleeve
Tabs on Both Sides
This harness provides extended reach with a protective black jacket for durability. The 40 inch tail surpasses standard lengths giving ample slack for routing around larger vehicle bodies or frames.
Pros
- Extra 40 inch length
- Black protective sheathing
- Improved waterproofing
- Easy grip tabs
- Pure copper wire
Cons
- Sleeve hides color wires
- Bulkier cable routing
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Protective sleeve covers individual wires reducing exposure to elements improving waterproofing. Pure copper conductors ensure stable function while tabs aid grip for secure plugging during travel preparation.
The sleeve hides wire colors making identification slightly harder during repair. Users must rely on initial color coding or testing to ensure correct terminal alignment for brake and turn signals.
Ideal for owners needing extra reach without exposed wire risks. The jacket supports longevity and flexibility suitable for diverse cargo utility trailers requiring secure wiring setups.
Extended Reach
40 inch tail provides extra slack for routing around large vehicle bodies.
Protective Jacket
Black sheathing protects wires from wear and improves waterproofing.
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8. CURT 58550 Vehicle-Side and Trailer-Side – Best Premium Build
CURT 58550 Vehicle-Side and Trailer-Side
16 Gauge Wires
72 Inch Wire Lead
Ergonomic Connector Design
Durable Black Molded Rubber
CURT delivers a premium harness with robust connectors and generous length. Molded rubber housings resist corrosion and rust offering long-term reliability for frequent towing demands.
Pros
- 72 inch long wire lead
- Ergonomic grip tabs
- Durable molded rubber
- Industry standard plug
- Ready to install
Cons
- Premium pricing
- Heavier rubber connectors
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The 72 inch wire provides maximum flexibility for vehicle side installations. Ergonomic tabs simplify handling while industry standard 5 pin design ensures compatibility across most trailer and tow models.
Premium materials justify the higher cost with durable construction. The 16 gauge wire supports heavier loads but the rubber housing is slightly heavier than plastic alternatives.
Best for professionals or heavy daily users. This harness offers superior durability and ease of use making it a top choice for those prioritizing longevity and performance.
Premium Durability
Molded rubber housing resists corrosion for long-lasting reliable connections.
Extra Wire
72 inch lead provides maximum flexibility for complex vehicle routing.
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9. Nilight 5 Way Flat Trailer Wiring Harness Plug – Best Insulation
Nilight 5 Way Flat Trailer Wiring Harness Plug
18 Gauge Heavy Duty Wires
22 Inch Extension Wire
300V Rated Voltage
Rubber Insulated Sheath
Nilight offers a high rated harness focused on electrical safety and insulation. The 300V rating and 105C heat resistance ensure stable performance even under heavy load or hot climates.
Pros
- High 4.9 user rating
- 300V voltage rating
- Heat resistant to 105C
- Rubber insulating sheath
- No exposed tape
Cons
- Standard length only
- Limited split wire
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Heavily insulated wires eliminate exposed tape concerns common in cheaper kits. Rubber sheathing protects against abrasion and moisture ensuring wires remain intact during regular use.
Installation is simple with color coded blunt cut wires ready for splicing. The 22 inch extension suits standard trailer needs but lacks split wire options for specific taillight routing.
Ideal for safety conscious owners needing proven reliability. This harness supports basic lighting functions with robust protection making it suitable for marine and utility trailers alike.
Voltage Rating
300V rating ensures safe performance under demanding electrical conditions.
Rubber Sheath
Insulated sheath prevents exposure and rust for cleaner wiring.
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10. Oyviny Vehicle-Side 5 Way Flat Trailer Wiring Harness – Best Female Extension
Oyviny Vehicle-Side 5 Way Flat Trailer Wiring Harness
5 Pin Female Plug
31 Inch Wire Lead
Bonded Wire Design
SAE J1128 Compliant
This harness provides a dedicated female connector for vehicle socket extensions. Useful for routing wires inside trunks or keeping vehicle connectors safe from external damage during transport.
Pros
- Female plug for vehicle socket
- 31 inch wire loop
- Bonded wire durability
- SAE standard compliance
- Ergonomic design
Cons
- Female end only
- No dust cover included
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Bonded wires ensure durability while SAE J1128 compliance guarantees accurate wiring. The 31 inch loop offers ample reach for vehicle side connections without needing custom splices.
Installation involves splicing into vehicle wiring to extend the socket safely. Color coding simplifies matching while the plug design offers good grip for reliable daily connections.
Perfect for protecting vehicle sockets or moving connection points. This harness suits owners seeking specialized vehicle side wiring without full male plug replacement.
Vehicle Side Focus
Female plug allows extending socket safely inside vehicle trunk.
SAE Standard
Compliance ensures accurate color codes and reliable electrical signals.
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Buying Guide – How to Choose the Best 5 Way Flat Trailer Wiring Harness Plug
Selecting the right harness requires considering wire gauge connector type and length to match your towing needs and vehicle requirements accurately.
Wire Gauge
Wire gauge determines current capacity and durability. Thicker gauges like 14AWG or 16AWG support heavier loads while 18AWG suits standard trailer lights effectively.
Choose thicker wire for frequent use or high load to prevent voltage drop.
Connector Type
Confirm whether you need male or female connectors. Male plugs connect to vehicle sockets while female extensions allow vehicle side routing or trunk protection.
Match connector type to your existing vehicle socket configuration.
Length Options
Length impacts routing flexibility. Shorter plugs minimize bulk while longer leads like 48 to 72 inches help avoid tension and simplify complex wiring paths.
Select length based on distance between vehicle socket and trailer connection.
Split vs Bonded
Split designs allow direct light connections without jumpers while bonded loops simplify splicing into existing harnesses for vehicle side installation.
Choose split for taillight clarity or bonded for vehicle socket routing.
Material Quality
Pure copper conductors and corrosion resistant brass terminals ensure conductivity and longevity. Rubber molded housings improve waterproofing for marine or wet environments.
Prioritize copper and rubber protection for reliable performance.
Compatibility Standards
Ensure compliance with SAE J1128 or industry standard 5 pin flat plugs. Correct color coding simplifies installation and avoids mismatched electrical signals.
Verify standard compatibility before purchasing to ensure fit.
Installation Ease
Look for pre-stripped wires and ergonomic design features like grip tabs. Color coded ends reduce errors while tabs improve handling during plugging.
Prioritize pre-prepared harnesses to reduce installation time.
Weather Resistance
Weatherproof features like dust covers or rubber sheathing protect terminals from moisture and debris. This is crucial for marine or off-road trailer use.
Choose weather resistant options for outdoor towing environments.
How to Use and Care for Your 5 Way Flat Trailer Wiring Harness Plug
Before installation inspect wires for damage and ensure connectors match your vehicle socket. Strip insulation cleanly if splicing and twist wires together before securing with solder or crimps.
Test all lights using a voltage tester after wiring to confirm correct function. Route wires away from moving parts and secure with zip ties to prevent friction wear during travel.
Store harnesses in dry conditions when not in use and clean terminals with a cloth regularly. Check connectors before each trip for corrosion or debris to maintain reliable electrical connections.
Frequently Asked Questions
What is the difference between 4 pin and 5 pin trailer plugs?
4 pin plugs handle basic lighting like brake turn and tail lights without reverse. 5 pin plugs add a reverse light wire allowing trailers to unlock and release when backing up.
How do I know which wire is ground on a 5 way harness?
The ground wire is usually white on 5 way harnesses. Verify by checking color coding labels on packaging to ensure proper connection to the trailer frame.
Can I use a 18AWG harness for larger trailers?
18AWG is sufficient for standard trailer lighting. For heavier loads or long wiring runs thicker gauges like 16AWG reduce resistance and prevent voltage drop issues.
Do these plugs fit all vehicle sockets?
Most 5 way flat plugs match industry standard vehicle sockets. Check your vehicle manual to confirm socket shape and compatibility before purchasing a harness.
How long should a trailer wiring harness be?
Harness length depends on vehicle type and trailer setup. Choose enough slack to route safely around bumpers without tension typically 22 to 72 inches.
Why is my trailer light not working after install?
Check connections for loose wires or corrosion. Test continuity with a multimeter and verify ground wire contact with trailer frame for proper function.
Are these plugs waterproof?
Many include dust covers or rubber housings for water resistance. Fully waterproof models protect against rain and mud but keep connectors dry for best longevity.
How do I splice the harness into my vehicle?
Match color coded wires and strip ends cleanly. Use crimp connectors or solder then cover with heat shrink tubing to seal against moisture and ensure safe contact.
Final Thoughts on Choosing the Best 5 Way Flat Trailer Wiring Harness Plug
These ten harnesses offer diverse options for varying towing needs. From Oyviny's ergonomic plug to CURT's premium length the top picks balance performance and installation simplicity.
Prioritize wire gauge and connector type based on your vehicle and trailer setup. Split designs ease taillight routing while bonded loops streamline vehicle side connections effectively.
Always check current prices before purchasing as listings update frequently. With the right harness your trailer lights will communicate reliably for safe towing every journey.