Top 9 Trailer Wiring Harness Adapter – Towing Hitch Wiring

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1. Hopkins Towing Solutions

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Hopkins 47345 4 Wire Flat Adapter

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Hopkins Towing Solutions #ad - 7 way rv blade to 4 Wire flat. Take the guesswork and frustration out of vehicle to trailer wiring. The new patent-pending LED series incorporates built-in trouble-shooting. If the trailer lights are not functioning correctly, you can isolate the problem by simply looking at the adapter. Includes function testing LEDs.
BrandHopkins Towing Solutions #ad
ManufacturerHopkins Manufacturing #ad
Height1.75 Inches
Length6.88 Inches
Weight0.2 Pounds
Width2.88 Inches
Part Number47345
Model47345
WarrantyHopkins warrants all products to be free from defects in material and workmanship, under normal use and service, for a peirod of 90 days from the date of original purchase, with the exception of the Brake-Force and Impulse brake control items, which are warranted to be free from defects in material and workmanship, under normal use and service, for the original buyer's lifetime

2. MICTUNING

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MICTUNING 4-Way Flat to 7-Way Round Blade Trailer Adapter Wiring Plug Connector with Mounting Bracket

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MICTUNING #ad - Provide extra protection - with the spring-loaded cover, high dust-proof, to avoid the adapter damage from the external environment when it is not in use. Make the wiring easier - plug and play, and customize the plug-in wiring system to connect the trailer, synchronize the trailer's signal light, convert the car's 4-pin flat socket to the 7-pin blade round socket for the trailer, which is very convenient and solves the trouble of rewiring every time.

Wide application - applicable to all towing vehicles that don't require electric brakes, semi-trailers, RVs, including trailers, etc.

High-quality manufacturing - using pure copper as the inner core, corrosion-resistant, wear-resistant, greatly improves the electrical conductivity. Simple to install - equipped with mounting bracket, and nuts, screws, just find the right position to install and tighten the nut to install successfully. With the high-quality PVC shell, effectively waterproof and long service life.
BrandMICTUNING #ad
ManufacturerMICTUNING #ad
Part NumberMIC-HA-359

3. ONLINE LED STORE

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ONLINE LED STORE 7-Way Blade to 4-Way Flat Trailer Adapter Nickel-Plated Copper Terminals Rugged Nylon Housing Compact Design 7-pin to 4-pin Trailer Wiring Plug Adapter

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ONLINE LED STORE #ad - Exceeds oem specifications - Nickel-plated copper electrical terminals are tough against corrosions while yielding superior conductivity. No tools needed - easily adapt your 7-way rv BLADE vehicle socket to 4-WAY FLAT connector used on lightweight trailers.

No more ugly dangling connectors - our 7-way blade to 4-way flat adapter eliminates the need of converter wiring harnesses and is compact enough to be stored in any of the vehicle's storage compartments. Locks securely in place - durable nylon housing designed to be latched on by the tow vehicle's socket while finger lugs allow easy removal when needed. Rugged nylon housing - Water, temperature, and shock resistant to provide years of reliable service.
BrandONLINE LED STORE #ad
ManufacturerONLINE LED STORE #ad
Height1.9 Inches
Length6.5 Inches
Width3.74 Inches
Part NumberACCEPSACP1003

4. MAXXHAUL

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MaxxHaul 70086 7-Way Round to 4-Way Flat Trailer Plug Adaptor with 18 Inch Flexible Cable Which Extends To 36 Inches

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MAXXHAUL #ad - Eliminates the need for Multiple Plugs and Adapters to Tow Various Vehicles. 7-way to 4-way adaptor does the Job of Otherwise Multiple Plugs and Adaptors. Brass connectors Enables for Solid Electrical Conductivity. Weatherproof molded construction with 18" AWG 300 Volt Rated Flexible Cord.
BrandMAXXHAUL #ad
ManufacturerMaxxtow Towing Products #ad
Height1.77 Inches
Length3.74 Inches
Width2.76 Inches
Part Number70086
Model70086
Warranty90 days

5. CURT

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CURT 57672 Dual-Output 4-Way Flat Vehicle-Side to 7-Way RV Blade Trailer Wiring Adapter

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CURT #ad - The wiring harness is also well-protected with the included slit loom sleeve. Weather-resistant. Versatile design. This trailer hitch wiring adapter plugs into any standard 4-way flat and can be used to connect the taillights, turn signals, brake lights, reverse lights, trailer brakes and auxiliary power some splicing required.

This dual-output trailer wiring adapter makes it easy to tow different trailers with your vehicle, equipping it with a standard 7-way RV blade socket while retaining use of the existing 4-way flat wiring. This trailer wiring harness adapter comes with dust covers for the 4-pin and 7-pin wiring sockets to protect the terminals from water, dirt and corrosion. This dual-output 4-pin to 7-pin trailer adapter wiring comes ready to plug into your vehicle or trailer wiring with minimal splicing required.

For long-lasting use and a reliable connection, the housing of this trailer harness adapter is made from durable black plastic that will never rust or corrode. It also includes a mounting bracket for convenient attachment to your trailer hitch or bumper. Standard connection. Durable construction. Easy to install.
BrandCURT #ad
ManufacturerCurt Manufacturing #ad
Height4 Inches
Length8 Inches
Weight1.1 Pounds
Width9 Inches
Part Number57672
Model57672
WarrantyOne-Year Limited Warranty

6. CURT

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CURT 55384 Replacement Vehicle-Side Custom USCAR 4-Pin Trailer Wiring Harness

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CURT #ad - No cutting! no splicing! this trailer wiring harness Ts into an existing USCAR connection on your vehicle and equips it with a standard 4-pin trailer wiring connector for plugging in and towing a trailer. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of this vehicle socket.

Uscar-specific. This uscar wiring harness is designed for select vehicles with a standard USCAR socket, ensuring the easiest possible installation and the most reliable wiring connection. 4-way trailer wiring is popular on a wide variety of trailers, adding versatile towing options for your vehicle. Easy grip. Standard connector.

The 4-flat trailer wiring can be used to connect trailer taillights, brake lights and turn signals. For long-lasting use and a reliable connection, the housing of the 4-pin vehicle wiring socket is made from durable black molded rubber that will never rust or corrode. Durable construction. It features a tab on top for a better grip when plugging into your trailer or unplugging. Easy to install.
BrandCURT #ad
ManufacturerCurt Manufacturing #ad
Height9 Inches
Length6 Inches
Weight0.65 Pounds
Width3 Inches
Part Number55384
Model55384
WarrantyOne-Year Limited Warranty

7. ONLINE LED STORE

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ONLINE LED STORE 7-Way Blade to 5-Way Flat Trailer Adapter Nickel-Plated Copper Terminals Rugged Nylon Housing Compact Design 7-pin to 5-pin Trailer Wiring Plug Adapter

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ONLINE LED STORE #ad - No tools needed - easily adapt your 7-way rv BLADE vehicle socket to 5-WAY FLAT connector used on lightweight trailers. No more ugly dangling connectors - our 7-way blade to 5-way flat adapter eliminates the need of converter wiring harnesses and is compact enough to be stored in any of the vehicle's storage compartments.

Locks securely in place - durable nylon housing designed to be latched on by the tow vehicle's socket while finger lugs allow easy removal when needed. Exceeds oem specifications - Nickel-plated copper electrical terminals are tough against corrosions while yielding superior conductivity. Rugged nylon housing - Water, temperature, and shock resistant to provide years of reliable service.
BrandONLINE LED STORE #ad
ManufacturerONLINE LED STORE #ad
Height1.9 Inches
Length6.5 Inches
Weight0.25 Pounds
Width3.74 Inches
Part NumberACCEPSACP1004

8. CURT

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CURT 57240 7-Way RV Blade Vehicle-Side to 4-Way Flat Trailer Wiring Adapter

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CURT #ad - It features tabs on the sides for a better grip when plugging into the vehicle or unplugging. This trailer hitch wiring adapter plugs into any standard 7-way RV blade and can be used to connect the taillights, brake lights and turn signals.

For long-lasting use and a reliable connection, the housing of this trailer harness adapter is made from durable black plastic that will never rust or corrode. Versatile design. No-splice install. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of this trailer wiring adapter. Easy grip.

Durable construction. This trailer wiring adapter makes it easy to connect a mismatched vehicle socket and trailer plug, adapting your 7-way RV blade socket connector on your vehicle into a standard 4-way flat. This 7-pin to 4-pin trailer adapter wiring comes ready to plug into your vehicle or trailer wiring with zero splicing required. Standard connection.
BrandCURT #ad
ManufacturerCurt Manufacturing #ad
Height2 Inches
Length4 Inches
Weight0.15 Pounds
Width3 Inches
Part Number57240
Model57240
WarrantyOne-Year Limited Warranty

9. ONLINE LED STORE

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4 Pin Flat Trailer Wiring Harness Kit Wishbone-Style SAE J1128 Rated 25' Male & 4' Female 18 AWG Color Coded Wires 4 Way Flat 5 Wire Harness For Utility Boat Trailer Lights Kits

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ONLINE LED STORE #ad - Sae j1128 rated- meets sae standards for a low voltage primary cable intended for use at a nominal system voltage of 60 V DC 25 V AC or less in surface vehicle electrical systems; backed by a 2 year warranty.

25' male & 4' female included- our 4-way trailer wiring harness includes both the male and female sides for added value. 18 awg color coded wires- color coded 18 awg wires clearly identify each wire's function; makes installation safe and straight-forward. Wishbone style wiring setup- wishbone design makes it easier to wire to the taillights; simplifies installation process. For trailers under & over 80" wide- long total wire length 25' plus 4' make this trailer harness kit perfect for trailers measuring under or over 80" wide.
BrandONLINE LED STORE #ad
ManufacturerONLINE LED STORE #ad
Height2.5 Inches
Length7.5 Inches
Weight0.95 Pounds
Width3.5 Inches
Part NumberACCEPSCBL0105
Model4336325634