5 Way Flat Trailer Wiring Harness Plug 22 inch
4.6Editor score
Corrosion resistant brass
18AWG wiring gauge
Standard 5 pin fit
In this guide
Finding the right 5 Way Flat Trailer Wiring Harness Plug ensures your trailer lights function safely and reliably on every journey. A quality plug delivers consistent power to brake lights, turn signals, and taillights while resisting corrosion and weather damage for long-term durability.
We evaluated ten top-rated harnesses based on wire gauge, connector material, length, and ease of installation. Our analysis focuses on products that offer durable construction, clear color coding, and reliable electrical conductivity for various trailer types including marine and utility models.
Each pick highlights specific strengths like split wire design or extended length for flexible routing. Prices and availability change frequently so check current listings before purchasing. Our detailed reviews help you choose the perfect match for your tow vehicle and trailer setup needs today.
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
CURT 58550 Vehicle-Side and Trailer-Side
4.7Editor score
72 inch wire lead
16 gauge pure copper
Ergonomic grip design
Top 10 Best 5 Way Flat Trailer Wiring Harness Plug in 2026 Compared
This side-by-side comparison highlights key specifications across all ten products to help you quickly identify the best fit for your towing needs based on length, wire quality, and connector features.
ProductsSpecificationsEditor scorePrice
Editor's Choice
Oyviny 5 Way Flat
22 inch wire lead
18AWG pure copper
Split wire design
Dust cover included
4.6Editor score
Editor's Choice
RED WOLF 5-Way Flat
22 male 31 inch
18AWG bonded wires
Male female adapter
Corrosion resistant
4.7Editor score
Best Premium
Oyviny 5 Way Extension
48 inch extension
Male female ends
18 gauge wires
Rubber molded plug
4.7Editor score
5 Pin Trailer Connector
25 inch length
14AWG pure copper
Split wire design
Dust cover included
4.2Editor score
Oyviny 4 Pin 5 Wire
18 inch harness
16AWG pure copper
Y split design
Anti-slip tabs
4.9Editor score
5 Way Flat Plug O-075
22 inch length
18AWG gauge
Brass terminals
Multi-purpose use
4.6Editor score
5 Way Trailer Connector DD011
40 inch length
18AWG wires
Jacketed cable
Ergonomic tabs
4.3Editor score
CURT 58550
72 inch length
16 gauge wires
Rubber housing
Color coded
4.7Editor score
Nilight 5 Way Flat
22 inch wire
18 gauge pure copper
Blunt-cut ends
Heat resistance
4.9Editor score
Oyviny 5 Way Female
31 inch wire lead
Bonded wire design
SAE compliant
Dust cover
4.7Editor score
1. Oyviny 5 Way Flat – Best Overall for Most Trailers
Oyviny 5 Way Flat Trailer Wiring Harness Plug
22 inch wire lead
18AWG pure copper
Split wire design
Dust cover included
The Oyviny 5 Way Flat Trailer Wiring Harness Plug stands out as our top pick due to its split wire design and reliable construction. With a 4.6 rating from users, it delivers consistent performance for marine and utility trailers. The 22 inch lead offers enough slack for typical hitch setups without excess bulk.
Pros
- Split wire simplifies taillight routing
- High conductivity pure copper wires
- Ergonomic tabs for easy plug
- Pre-stripped ends save time
Cons
- Shorter length limits vehicle flexibility
- Dust cover fits loosely
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Its 18AWG pure copper wires ensure excellent conductivity while the split wire layout eliminates the need for jumper wires across the axle. This design connects directly to each taillight for cleaner installation. The brass terminals resist corrosion effectively in wet or salty environments.
The ergonomic tabs on both sides of the plug improve grip during connection. Pre-stripped ends reduce installation time significantly. However the shorter length might require extension for vehicles with rear-mounted sockets and the dust cover can feel loose after repeated use.
Ideal for trailer owners needing a quick reliable replacement or upgrade. The color coded wires simplify matching functions correctly during setup. This harness balances performance and ease of use better than most competitors in its price range for everyday towing tasks.
Split Wire Design Advantage
The split wire feature allows direct connection to each taillight removing the need for complex jumper setups across the trailer axle.
Corrosion Resistant Materials
Brass terminals with tin plating provide strong protection against rust ensuring long term reliability even in harsh weather conditions.
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2. RED WOLF 5-Way Flat – Best Extension Kit
RED WOLF 5-Way Flat Trailer Wire Harness
22 male 31 inch
18AWG bonded wires
Male female adapter
Corrosion resistant
The RED WOLF 5-Way Flat kit offers both male and female connectors making it versatile for extension or replacement tasks. With a 4.7 rating it addresses needs where vehicle and trailer sockets require bridging. The 22 inch male and 31 inch female provide extra reach.
Pros
- Includes male and female ends
- Longer female cable length
- Universal trailer compatibility
- Heavy duty bonding
Cons
- Higher price for pair
- Splicing required on one end
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Its 18AWG bonded wires maintain structural integrity during frequent plugging. The male female adapter lets you store the vehicle socket inside the trunk and connect externally when needed. This keeps connectors protected when not in use while enabling quick hookups.
Installation requires splicing one end into your system which adds time but ensures a permanent secure fit. The corrosion resistant terminals handle outdoor exposure well. Some users note the price reflects the dual pack utility rather than single plug value.
Perfect for those needing flexibility between vehicle and trailer ends. The bonding prevents wire separation over time. This kit suits owners who want a complete solution for extending or adapting their 5 way wiring without buying separate plugs.
Dual Connector Utility
Having both male and female ends allows flexible installation for vehicle side extension or trailer side replacement in one package.
Bonded Wire Durability
Bonded loop wire maintains wire alignment and reduces stress during movement for reliable electrical connections over many uses.
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3. Oyviny 5 Way Flat Trailer Wire Extension – Best Length
Oyviny 5 Way Flat Trailer Wire Extension
48 inch extension
Male female ends
18 gauge wires
Rubber molded plug
The Oyviny 5 Way Flat Trailer Wire Extension provides ample length with its 48 inch span between male and female ends. Rated 4.7 it suits vehicles where the socket sits far from the hitch point. The rubber molded connectors ensure waterproofing and durability.
Pros
- Generous 48 inch length
- Universal socket fit
- Rubber molded connectors
- Color coded wires
Cons
- More bulk to store
- May drape if over-long
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Its universal design fits any trailer with a standard 5 way plug. Pre installed color coded wires stand for tail brake turn reverse and ground functions. This eliminates guesswork during installation and helps prevent wiring errors that cause light malfunctions.
The extra length allows flexible routing around vehicle frames but may require securement to avoid dragging. Rubber housing protects terminals from impacts and moisture. Some users find the bulkiness less ideal for tight storage spaces compared to shorter leads.
Recommended for vehicles with deep trunks or rear mounted connectors needing distance. The durable construction supports frequent use. This extension offers reliable connectivity without requiring custom splicing for most standard trailer setups needing extra reach.
Extended Reach Capability
The 48 inch span accommodates vehicles where the socket is distant from the hitch allowing neat routing without tension.
Universal Socket Compatibility
Standard 5 way flat design ensures fit across most trailers and tow vehicles without needing adapter conversions.
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4. 5 Pin Trailer Connector 14AWG – Best Heavy Duty Option
5 Pin Trailer Connector 14AWG
25 inch length
14AWG pure copper
Split wire design
Dust cover included
The 5 Pin Trailer Connector features 14AWG pure copper wires offering thicker conductivity than standard 18AWG harnesses. Rated 4.2 it suits high load applications where minimal resistance matters. The 25 inch length provides reasonable reach for utility or ATV trailers.
Pros
- Thicker 14AWG wires
- Stronger conductivity
- Split wire layout
- PVC insulation
Cons
- Fewer reviews than others
- Heavier gauge less flexible
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Its split wire design allows direct taillight connections reducing complexity. The thick PVC insulation protects against abrasion and weather exposure. Color coded wires streamline installation while the dust cover protects the connector when disconnected to extend service life.
The heavier gauge may reduce flexibility compared to thinner wires but ensures stability. Pre stripped pigtails simplify splicing. Some users report fewer reviews than other brands so real world durability data is still emerging compared to established options.
Best for owners prioritizing electrical performance over flexibility. The robust construction handles demanding conditions well. This connector delivers reliable power transmission for larger trailers where voltage drop could affect light performance during long hauls.
Thicker Wire Advantage
The 14AWG pure copper conductors reduce electrical resistance ensuring brighter lights and stable signal transmission under load.
Insulation Durability
Thick PVC insulation shields wires from physical damage and environmental exposure maintaining integrity over time.
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5. Oyviny 4 Pin 5 Wire – Best for 4 Pin Systems
Oyviny 4 Pin 5 Wire Trailer Wiring Harness
18 inch harness
16AWG pure copper
Y split design
Anti-slip tabs
The Oyviny 4 Pin 5 Wire harness holds the highest rating of 4.9 for its reliable Y split design. While rated for 4 pin systems it includes five wires to separate taillights easily. This suits utility and boat trailers without hydraulic brake needs.
Pros
- Highest rating 4.9
- Y split for taillights
- Shorter length
- 16AWG quality
Cons
- Only for 4 pin
- May lack 5th wire
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Its 16AWG pure copper wires offer good conductivity while the 18 inch length keeps things compact. Anti slip tabs on top and bottom improve grip. The Y split design eliminates axle crossing wires simplifying installation and reducing points of failure.
This harness is ideal for lighter trailers where reverse lights aren't needed. Pre stripped pigtails connect to existing wiring quickly. The short length avoids bulk but might not suit vehicles needing extension between socket and hitch point.
Recommended for simple utility setups prioritizing ease of installation. The high user satisfaction reflects consistent quality. Choose this if your trailer uses a standard 4 way plug and you want reliable taillight control with minimal wiring complexity.
Y Split Simplification
The Y split design separates taillight circuits enabling direct wiring to each side without crossing wires over the trailer axle.
Compact and Reliable
At 18 inches it offers a compact solution with high user ratings proving dependable performance in everyday utility towing.
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6. 5 Way Flat Trailer Wiring Harness Plug 22 inch – Best Value Pick
5 Way Flat Trailer Wiring Harness Plug 22 inch
22 inch length
18AWG gauge
Brass terminals
Multi-purpose use
The 5 Way Flat Trailer Wiring Harness Plug offers exceptional value with solid 18AWG construction at a budget friendly price. Rated 4.6 it delivers essential function for cargo and marine trailers. Its 22 inch length covers most standard trailer replacement needs.
Pros
- Affordable price
- Standard 22 inch length
- Corrosion resistant brass
- Multi-purpose utility
Cons
- Basic design
- No dust cover
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The brass terminals resist corrosion while the 5 way flat plug fits common vehicle sockets. Color coding helps identify functions quickly during installation. The cable suits various trailer types including horse motorcycle and utility applications effectively.
While it lacks extra features like dust covers it performs reliably for basic setups. The length provides enough flexibility for most hitch configurations. Some users may prefer longer leads for rear mounted sockets but this meets standard requirements efficiently.
Best for buyers needing a simple reliable plug without extra cost. The straightforward design ensures compatibility and durability. Choose this for budget-conscious projects requiring a dependable 5 way connection for everyday trailer lighting tasks.
Cost Effective Quality
This harness delivers reliable 18AWG performance at a lower price point making it ideal for straightforward trailer wiring jobs.
Standard Compatibility
The 5 way flat plug design matches common sockets ensuring easy integration into existing tow vehicle wiring systems.
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7. 5 Way Trailer Connector Wire 40 inch – Best Extended Lead
5 Way Trailer Connector Wire 40 inch
40 inch length
18AWG wires
Jacketed cable
Ergonomic tabs
The 5 Way Trailer Connector Wire offers 40 inches of length providing ample reach for distant vehicle sockets. Rated 4.3 its black jacketed cable protects individual wires from abrasion. This suits setups requiring routing around frames or long extensions.
Pros
- 40 inch extra length
- Black sheath protection
- Ergonomic plug tabs
- Color coded wires
Cons
- Jacket adds bulk
- Fewer user reviews
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Its jacketed design keeps wires hidden and protected while maintaining color coding for connections. The ergonomic tabs aid grip during plugging. The 18AWG wires provide consistent conductivity for brake turn and reverse signals effectively.
The extra bulk from the jacket may be noticeable during storage but improves durability. Pre stripped ends simplify installation. Users note fewer reviews but the construction suggests reliable performance for longer runs without exposed wire damage.
Ideal for trucks or SUVs needing additional clearance between socket and hitch. The jacketed cable resists wear better than standard leads. Choose this when extended reach is critical for safe and organized wiring in large towing vehicles.
Jacketed Protection
The black sheath shields internal wires from physical damage ensuring longevity and neat appearance during extended use.
Extended Cable Length
The 40 inch span provides necessary slack for vehicles where the plug socket sits far from the hitch point.
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8. CURT 58550 – Premium Long Run Harness
CURT 58550 Vehicle-Side and Trailer-Side
72 inch length
16 gauge wires
Rubber housing
Color coded
The CURT 58550 delivers the longest 72 inch wire lead ensuring flexibility for any vehicle setup. Rated 4.7 it features 16 gauge wires for robust conductivity. The rubber housing resists rust and corrosion for lasting performance in tough conditions.
Pros
- Longest 72 inch length
- 16 gauge heavy duty
- Durable rubber housing
- Color coded
Cons
- Highest price point
- Overkill for short runs
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Color coded wires simplify identification of tail brake turn reverse and ground functions. The ergonomic tabs on both connectors improve grip. This set suits large trucks or trailers needing extensive routing without custom splicing requirements.
The premium price reflects the extended length and heavy duty construction. It may exceed needs for short hitches but ensures future proofing. Some users appreciate the reliability of a trusted brand for critical towing safety components.
Best for professional or frequent tow operators requiring maximum flexibility. The 16 gauge wires handle electrical loads well. Choose this when you need the longest reliable option to avoid custom wiring on varied vehicle setups.
Maximum Flexibility
The 72 inch span accommodates virtually any vehicle socket location without additional custom wiring or extensions.
Heavy Duty Construction
With 16 gauge wires and rubber housing it withstands frequent use and harsh environments better than standard harnesses.
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9. Nilight 5 Way Flat – Best Weather Resistant
Nilight 5 Way Flat Trailer Wiring Harness Plug
22 inch wire
18 gauge pure copper
Blunt-cut ends
Heat resistance
The Nilight 5 Way Flat Harness holds an outstanding 4.9 rating for its durable construction and weather resistant features. Rated 18 gauge pure copper it delivers consistent power across functions. The heat resistant sheath supports high temperature exposure.
Pros
- Excellent 4.9 rating
- Heat resistant sheath
- Durable rubber wrap
- Pure copper terminals
Cons
- Blunt cut ends need care
- No dust cover included
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Blunt cut color coded wires allow easy splicing into existing harnesses. The insulating rubber wrap prevents corrosion and rust over time. This design ensures reliable performance for marine or boat trailers facing frequent wet conditions effectively.
While blunt ends require careful stripping the rubber wrapping adds extra protection. No dust cover is included but the connector design resists moisture. Users report high satisfaction with build quality and resistance to abrasion in demanding environments.
Recommended for boat or marine owners prioritizing weatherproofing. The high user rating reflects consistent reliability. Choose this when exposure to water or heat is a primary concern for your trailer lighting system safety and function.
Heat and Water Resistance
Insulating rubber wrap and heat resistant materials protect the harness from environmental damage and high operating temperatures.
Reliable User Ratings
With a 4.9 rating users confirm dependable performance and build quality suitable for demanding towing conditions.
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10. Oyviny Vehicle-Side 5 Way Flat – Best Female Adapter
Oyviny Vehicle-Side 5 Way Flat Trailer Wiring Harness
31 inch wire lead
Bonded wire design
SAE compliant
Dust cover
The Oyviny Vehicle-Side 5 Way Flat harness offers a female connector for vehicle socket extension. Rated 4.7 its 31 inch lead provides extra reach into trunks or rear panels. The dust cover protects terminals effectively when not in use.
Pros
- Female connector extension
- 31 inch wire lead
- Bonded wire durability
- SAE J1128 compliant
Cons
- Female end only
- Specific vehicle use
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Bonded wires ensure durability while SAE J1128 compliance guarantees standard interface specifications. Pre stripped ends speed up installation. Color coded wires help match functions accurately for brake turn reverse and ground connections easily.
Designed specifically for vehicle-side use it integrates cleanly into existing systems. The brass terminals resist corrosion well. Some users may find the female design limits versatility but it solves specific socket routing issues effectively.
Best for vehicles needing to extend or protect the female socket. The dust cover adds practical protection. Choose this if your setup requires a dedicated female adapter for secure and organized wiring inside the vehicle compartment.
Vehicle Socket Protection
The dust cover and female design safeguard the vehicle socket from debris when not connected to a trailer.
SAE Interface Compliance
Compliance with SAE J1128 specifications ensures compatibility with standard wiring systems for reliable connections.
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Buying Guide – How to Choose the Best 5 Way Flat Trailer Wiring Harness Plug
Choosing the right harness depends on your trailer type vehicle socket location and desired wiring features.
Wire Gauge
Wire gauge affects electrical conductivity and durability. Thinner 18AWG wires suit standard lighting while 16AWG or 14AWG reduces voltage drop for larger trailers or high current loads.
Prioritize 16AWG or thicker for heavy-duty use and 18AWG for typical utility needs.
Connector Material
Brass terminals with tin plating offer superior corrosion resistance. Avoid cheaper alloys that rust quickly especially in marine or wet environments.
Choose tinned brass terminals to ensure long-term reliability in all weather conditions.
Length
Length determines routing flexibility. Standard 22 inch leads work for most hitches while 40 or 72 inch lengths accommodate distant sockets.
Select length based on your vehicle socket position relative to the hitch point.
Split vs Bonded Wire
Split wire designs allow direct taillight connection eliminating jumper wires. Bonded wires are compact but may require extra routing steps.
Choose split wire for simpler taillight setups and bonded for streamlined bundles.
Color Coding
Standard color coding prevents wiring errors. Look for clearly marked wires for tail brake turn reverse and ground.
Verify colors match industry standards before purchasing to avoid installation mistakes.
Dust Cover
A dust cover protects connectors from debris and moisture when not in use. This extends service life and prevents corrosion.
Prioritize harnesses with included dust covers for better protection during storage.
Vehicle vs Trailer Side
Some harnesses provide female vehicle-side adapters while others offer male trailer-side plugs. Ensure compatibility with your setup.
Identify whether you need vehicle-side or trailer-side ends before ordering.
Brand Reputation
Established brands like CURT or Nilight often offer higher build quality. Check user ratings and warranty terms before deciding.
Select reputable brands for critical safety components like trailer wiring.
How to Use and Care for Your 5 Way Flat Trailer Wiring Harness Plug
Before installation verify the harness length matches your socket distance. Connect the female end to your vehicle and male end to the trailer ensuring color-coded wires align correctly for brake turn and reverse lights.
After connecting test all lights including brake turn signals and reverse lights with someone watching the trailer. Inspect connections for tight fits and ensure the dust cover is used when the trailer is disconnected.
Regularly clean terminals with a wire brush to prevent corrosion. Store the harness in a dry place away from direct sunlight to maintain insulation integrity and protect rubber components from cracking.
Frequently Asked Questions
Can a 5 way flat plug replace a 4 way?
Yes a 5 way flat plug works for 4 way trailers by using only four pins. Connect tail brake turn and ground leaving the reverse pin unused. Ensure your vehicle socket matches the 5 way flat design for proper fit.
What wire gauge is best for trailer lights?
Standard 18AWG suits most utility trailers while 16AWG is better for long runs or larger loads. Thicker wires reduce voltage drop and improve brightness for brake and turn signals especially in extended setups.
How do I know if my trailer needs 5 way?
Use a 5 way plug if your trailer has reverse lights or hydraulic brakes. Most standard utility or boat trailers without reverse lights can use 4 way plugs but check your trailer wiring requirements before choosing.
Are all 5 way plugs universal?
Most 5 way flat plugs follow standard SAE specifications ensuring compatibility across brands. Verify your vehicle socket shape matches the harness type before purchasing to avoid fit issues.
Why do trailer lights flicker or fail?
Flickering often stems from loose connections corrosion or insufficient wire gauge. Check terminal tightness clean connectors and ensure wires match standard color codes. A faulty ground can also cause intermittent lighting issues.
Do I need a separate ground wire?
Yes every harness requires a dedicated ground wire for stable electrical flow. Connect the ground terminal to a clean metal surface on your vehicle to ensure reliable lighting function.
How often should I replace my wiring?
Inspect wiring annually and replace if insulation is cracked or terminals corroded. For harsh environments like marine use replace every two years. Regular maintenance extends lifespan and ensures safety.
Can I splice wires myself?
Yes pre-stripped harnesses simplify splicing into existing wiring. Use crimp connectors and electrical tape or heat shrink tubing to seal joints securely. Follow color codes to avoid wiring errors.
Final Thoughts on Choosing the Best 5 Way Flat Trailer Wiring Harness Plug
Our top pick Oyviny 5 Way Flat excels with split wire design and durable construction. The budget-friendly O-075 plug and premium CURT 72 inch harness cover other needs effectively.
Prioritize wire gauge length and corrosion resistance based on your trailer type. Ensure color coding matches your wiring needs for smooth installation.
Prices vary and stock fluctuate so verify current listings before purchasing. Select the harness that fits your vehicle socket and trailer layout for reliable lighting on every trip.