As an Amazon Associate I earn from qualifying purchases.
Perfect length - with a perfect length of 3ft, it's easy to solve the problem of the trailer line is too short on the journey, easy to connect your trailer to your car. Wide application - suitable for all types of vehicles, cars, boats, RVs, including trailers, etc.

Durable construction - 4 pin connector with the fully jacketed cable harness, protects inner wires from the bad weather and hazardous road conditions, heavy duty and for long service life.
Widely application - this 4-wire trailer lighting extension applies to any types of trailers including marine boat trailer, horse trailer and other cargo utility trailers as long as it has a 4-way connection. Useful cap included - a sealing rubber cover for the truck/female end connector, keeps the terminals clean, especially when you live in lake effect or heavy snow areas, weather sealed very well. Please confirm the length you need before ordering.

The 72-inch wire loop provides plenty of extra length for a flexible installation. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of these vehicle-trailer connectors.
These vehicle-trailer connectors make great replacement 4-flat wiring plugs and sockets. Reliable connection. These 4-pin trailer wiring plugs come ready to splice into your existing vehicle and trailer wiring. They feature tabs on the top and bottom for a better grip when plugging in or unplugging. The 4-pin wiring design matches industry-standard 4-way flat connectors and is compatible with a wide variety of trailers.

Truck bed extension: this trailer wiring harness is designed to be an extension of the existing tow wiring of your truck, plugging into a 7-way RV blade socket for connecting 5th wheel wiring or gooseneck wiring. Durable construction. Perfect length: with a perfect length of 3ft, it's easy to solve the problem of the trailer line is too short on the journey, easy to connect your trailer to your car.


Package contents: package includes 1 4-foot 1. 2m extension for your convenience.


They have 16-gauge wires and can be used to connect the taillights, brake lights and turn signals. Versatile design. These vehicle-trailer connectors make great replacement 4-flat wiring plugs and sockets.
Equipped with color-coded wires, these 4-prong trailer wiring connectors come ready to install on your vehicle. The 12-inch wire loop provides extra length for an easy installation. These 4-pin trailer wiring plugs come ready to splice into your existing vehicle and trailer wiring.

Wire diagram: color coded wires help with installation. Harness kit includes two wiring harnesses with flat four connectors, splice connectors and all the mounting hardware required for basic trailer hookup.

1. MICTUNING
#ad
MICTUNING 7 Way Trailer Plug Socket Extension Cable, 7 Blade Trailer Wiring Connector Cord Wire 3ft 10-14 AWG
#adMICTUNING #ad - Excellent electrical conductivity - the socket with copper pin contacts, the electrical conductivity reaches the extreme, and the wire made of multi-strand copper core, anticorrosive and anti-rust, very durable.Perfect length - with a perfect length of 3ft, it's easy to solve the problem of the trailer line is too short on the journey, easy to connect your trailer to your car. Wide application - suitable for all types of vehicles, cars, boats, RVs, including trailers, etc.
More information #ad
Easy to install - plug and use, no need to rewiring your trailer, install the trailer extension cable on your truck bed and insert the existing bumper hook, it is very convenient. Better shell protection - pvc outer material, wear-resistance, and damage, precise structure, effectively extending the service life of the wire.Brand | MICTUNING #ad |
Manufacturer | MICTUNING #ad |
Weight | 1 Pounds |
Part Number | MIC-TEC-337 |
More information #ad
2. CARROFIX
#ad
CARROFIX Trailer 4-Wire Flat Extension Harness 28" Inches Flexible Coiled Cable with 4 Pin Male & Female Connector
#adCARROFIX #ad - Brand new & upgraded design - trailer 4 wire extension cable, heavy duty 18 gauge wires, overall length 36" inches, to be as a good extension when your hook up is short Tip: the length of this coiled cable is 36 inches = 3ft when fully extended, while the normal working length should be less than 28 inches.Durable construction - 4 pin connector with the fully jacketed cable harness, protects inner wires from the bad weather and hazardous road conditions, heavy duty and for long service life.
More information #ad
Plug-n-play design - no need to splice wires, this trailer 4-pin flexible conversion cable comes to easily plug into your existing wiring to provide connections for both vehicle and trailer. Widely application - this 4-wire trailer lighting extension applies to any types of trailers including marine boat trailer, horse trailer and other cargo utility trailers as long as it has a 4-way connection. Useful cap included - a sealing rubber cover for the truck/female end connector, keeps the terminals clean, especially when you live in lake effect or heavy snow areas, weather sealed very well. Please confirm the length you need before ordering.
Brand | CARROFIX #ad |
Manufacturer | CARROFIX #ad |
Height | 1.97 Inches |
Length | 7.48 Inches |
Width | 1.38 Inches |
Part Number | C0139 |
More information #ad
3. CURT
#ad
CURT 58050 Vehicle-Side and Trailer-Side 4-Pin Flat Wiring Harness with 72-Inch Wires
#adCURT #ad - Durable construction. For long-lasting use and a reliable connection, the housing of these 4-pin trailer wiring plugs is made from durable black molded rubber that will never rust or corrode. Ready to install. They have 16-gauge wires and can be used to connect the taillights, brake lights and turn signals.The 72-inch wire loop provides plenty of extra length for a flexible installation. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of these vehicle-trailer connectors.
More information #ad
Versatile design. Equipped with color-coded wires, these 4-prong trailer wiring connectors come ready to install. Easy grip. These vehicle-trailer connectors make great replacement 4-flat wiring plugs and sockets. Reliable connection. These 4-pin trailer wiring plugs come ready to splice into your existing vehicle and trailer wiring. They feature tabs on the top and bottom for a better grip when plugging in or unplugging. The 4-pin wiring design matches industry-standard 4-way flat connectors and is compatible with a wide variety of trailers.
Brand | CURT #ad |
Manufacturer | Curt Manufacturing #ad |
Height | 2 Inches |
Length | 7 Inches |
Weight | 0.3 Pounds |
Width | 2 Inches |
Part Number | 58050 |
Model | 58050 |
Warranty | Limited Lifetime |
More information #ad
4. Nilight
#ad
50050R 7-Way Trailer Plug Socket Extension Cable 3FT Long 10-14 AWG Double-Prong Copper Terminals/Wires for 7-Blade Trailer Wiring Connector Cord, 2 Years Warranty, Nilight
#adNilight #ad - Plug-n-play versatility: extra secure double-prong terminals makes this cable an excellent plug-n-play extension for your existing trailer harness without permanent installation.Truck bed extension: this trailer wiring harness is designed to be an extension of the existing tow wiring of your truck, plugging into a 7-way RV blade socket for connecting 5th wheel wiring or gooseneck wiring. Durable construction. Perfect length: with a perfect length of 3ft, it's easy to solve the problem of the trailer line is too short on the journey, easy to connect your trailer to your car.
More information #ad
For long-lasting use and a reliable connection, the housing of the 7-pin socket is made from durable molded black plastic and has a spring-loaded dust cover to protect the connection points. Wide application - suitable for all types of vehicles, boats, cars, including trailers, RVs, etc.Brand | Nilight #ad |
Manufacturer | Nilight #ad |
Part Number | 50050R |
Model | 50050R |
Warranty | 2 Years Warranty |
More information #ad
5. HONGKINGBO
#ad
Trailer Wire Extension Plug, 4 Pin Hitch Light Trailer Wiring Harness Extender with Rubber Cab for LED Brake Tailgate Light Bar, 32" Inch 4 Way Flat 4 Pin Universal Wiring Connector
#adHONGKINGBO #ad - Trailer 4 wire extension, color coded heavy duty 20 gauge wires, 32 inch. Fits for all types of trailers including marine boat trailer, horse trailer, ATV trailer, and other cargo utility trailer hitches which have a 4-way plug. No need to splice wires, simply extend them with this extender into existing wiring to provide connections for both vehicle and trailer.More information #ad
4 way flat output connects tail lights, brake lights and turn signals. 4 pin trailer plug 4 way flat connector with sealing cap on the end keeps the leads dry when not in use. Constructed with bonded wires for easier installation.Brand | HONGKINGBO #ad |
Manufacturer | HONGKINGBO #ad |
Part Number | HONGKINGBO-TO CHE |
More information #ad
6. ABN
#ad
ABN Trailer Wire Extension, 4-Way 4-Pin Plug Flat 20 Gauge – Hitch Light Trailer Wiring Harness Extender, 4ft
#adABN #ad - Built to last: heavy-duty 20-gauge wires for strength and longevity; Color-coded for your convenience. Effortless trailer wiring: use the abn trailer wire extension, 4’ Foot, 4-Way 4-Pin Plug Flat 20 Gauge – Hitch Light Trailer Wiring Harness Extender to extend current truck to trailer wires.Package contents: package includes 1 4-foot 1. 2m extension for your convenience.
More information #ad
Various applications: 4-way standard flat light connector with trailer ends; For all types of trailers including marine boat trailer, horse trailer, ATV trailer, motorcycle trailer, and other cargo utility trailer hitches tow/haul vehicle must have 4-way plug. No splicing: no need to splice your new wires, simply extend them with this extender.Brand | ABN #ad |
Manufacturer | ABN #ad |
Height | 7 Inches |
Length | 1.5 Inches |
Weight | 0.2 Pounds |
Width | 2 Inches |
Part Number | 1893 |
Model | ABN 1886 |
More information #ad
7. CARROFIX
#ad
CARROFIX 4-Way Flat Trailer End Connector with 32-Inch Jacketed Cable Wire 4 Pin Trailer Wiring Extension
#adCARROFIX #ad - Made with pure copper contacts for good conductivity, 4 way flat output connects tail lights, brake lights and turn signals. No need to splice wires, simply extend them with this extender into existing wiring to provide connections for both vehicle and trailer.More information #ad
Money back guarantee, if you aren't 100% satisfied for any reason in 1 YEAR, we'll refund you money. 4 pin trailer plug connector with a protective cover on the end to keep the leads dry when not in use. Molded 4 way trailer wiring connector, heavy duty 18 gauge jacketed cable wire, 32-inch long.Brand | CARROFIX #ad |
Manufacturer | CARROFIX #ad |
Height | 3 Inches |
Length | 32 Inches |
Width | 5 Inches |
Part Number | C0127 |
More information #ad
8. CURT
#ad
CURT 58381 Vehicle-Side and Trailer-Side 4-Pin Flat Wiring Harness with 12-Inch Wires
#adCURT #ad - Ready to install. The 4-pin wiring design matches industry-standard 4-way flat connectors and is compatible with a wide variety of trailers. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of these vehicle-trailer connectors.They have 16-gauge wires and can be used to connect the taillights, brake lights and turn signals. Versatile design. These vehicle-trailer connectors make great replacement 4-flat wiring plugs and sockets.
More information #ad
Reliable connection. Durable construction. They feature tabs on the top and bottom for a better grip when plugging in or unplugging. Easy grip. For long-lasting use and a reliable connection, the housing of these 4-pin trailer wiring plugs is made from durable black molded rubber that will never rust or corrode. Equipped with color-coded wires, these 4-prong trailer wiring connectors come ready to install on your vehicle. The 12-inch wire loop provides extra length for an easy installation. These 4-pin trailer wiring plugs come ready to splice into your existing vehicle and trailer wiring.
Brand | CURT #ad |
Manufacturer | Curt Manufacturing #ad |
Height | 2 Inches |
Length | 7 Inches |
Weight | 0.2 Pounds |
Width | 2 Inches |
Part Number | 58381 |
Model | 58381 |
Warranty | Limited Lifetime |
More information #ad
9. Donepart
#ad
Donepart Trailer Wiring Harness 4 Flat 25ft Trailer Wiring Extension Kit, Wishbone Style Trailer Wiring Fit for Utility Trailer Boat UTV Trailer Lights and Wiring Kit
#adDonepart #ad - 25ft & 4ft trailer wiring kit: this wiring harness is a complete kit for wiring trailer stop, turn and running lights. Suitable for trailers under and over 80″ in width.Wire diagram: color coded wires help with installation. Harness kit includes two wiring harnesses with flat four connectors, splice connectors and all the mounting hardware required for basic trailer hookup.
More information #ad
Function: powers tail light, stop light, turn signals, and all running lights, Green - passenger side stop/turn. White - ground, yellow - driver side stop/turn, Brown - tail lights, . The 25 ft. Wishbone design: come with 2 tail light wire includes male and female 4-flat connectors, split for simple wiring.Brand | Donepart #ad |
Manufacturer | Donepart #ad |
Part Number | A50009 |
More information #ad
10. X AUTOHAUX
#ad
X AUTOHAUX 5ft 7 Way Round to 5 Way Pin Flat Trailer Wire Coiled Wiring Connector Adapter Plug for Truck RV Trailer Full Length 5 Foot 60 Inches
#adX AUTOHAUX #ad - With the function of connecting running lights, right turn and brake signal. Coiled cable cord stretches at least 5ft long, which provides sufficient space for towing vehicle and trailer. Compact design between the wire and plug, well protect the adapter from the dust and water, for long service life.More information #ad
Easy installation and plug in use, fits for most boat, trailer and RV towing. Adapts a 7 way trailer hitch used for RV and boat towing to a 4 or 5 flat connection. Tin plated terminals and a abrasion resistant, left turn and brake signal, coiled cable that makes it more sturdy than others.Brand | X AUTOHAUX #ad |
Manufacturer | X AUTOHAUX #ad |
Part Number | a20123000ux0177 |
More information #ad