FINAL DAYS for Labor Day Sale Savings! Upgrade to 2nd Day Air for only $2 more*

Boat Trailer Wiring Adapters & Converters

21 Items
Winter Planning Starts Now! ON SALE
Seasense Trailer Adapter
Seasense Trailer Adapter
With the SeaSense Trailer Adapter, you can quickly establish an electrical connection between your vehicles and configure trailer wiring system. It …
Starting at $7.18
Full StarFull StarFull StarFull StarFull Star(2)
List price: $8.89
In stock

Seachoice Trailer "Y" Harness
Seachoice Trailer "Y" Harness
Wiring your trailer is much easier, when you have the Seachoice Trailer Y Harness. This flat-4 pole wiring harness has vehicle side connector and …
Starting at: $19.37
List price: $27.95
In stock

Wiring Kit
Wiring Kit
Wiring your boat trailer? The Wesbar Wiring Kit is designed to make wiring boat trailers simple, easy and safe. The wires are color coded for easy …
Starting at: $7.33
List price: $8.30
In stock

Seasense Fully Grounded Wire Harness
Seasense Fully Grounded Wire Harness
Full ground wire harness has ground wire which runs the complete length of the trailer to eliminate shorts and other time consuming trailer wiring …
Your price: $19.04
Full StarFull StarFull StarFull StarFull Star(2)
List price: $23.99
In stock

Wesbar Extension Harness
Wesbar Extension Harness
The Wesbar Extension Harness offers quality service for many years to come. This is a 4-way to 4-way or 5-way to 5-way extension harness that is …
Starting at: $5.94
List price: $7.45
In stock

Sierra Vehicle Wiring Socket
Sierra Vehicle Wiring Socket
For secure and efficient wiring for of boat trailer use the Sierra Vehicle Wiring Socket. This socket comes with spring loaded feature that securely …
Your price: $10.99
List price: $15.29
In stock

Trailer Wiring Harness
Trailer Wiring Harness
25' wishbone trailer harness. Color coded wires with 4' vehicle side connector, 4 pole. Frame clips included.
Your price: $19.24
List price: $24.99
In stock

Optronics 7-Way To 5-Way Trailer Adapter Cable
Optronics 7-Way To 5-Way Trailer Adapter Cable
Now you can easily convert 7-way round blade connector in your trailer to a 5-way flat pin female connector using the Optronics Adapter Cable. It …
Your price: $14.59
In stock

Standard Vehicle/Trailer Adapters - Step-Down Style
Standard Vehicle/Trailer Adapters - Step-Down Style
The Wesbar Standard Vehicle/Trailer Adapter lets you switch from one style switch to another with ease, especially when towing several trailers. …
Starting at: $9.86
List price: $12.36
In stock

Taillight Converter - Cequent Trailer Products - Wesbar
Taillight Converter - Cequent Trailer Products - Wesbar
Taillight converter with 12" leads and 60" 4-flat car end connector.
Your price: $16.01
List price: $21.64
In stock

Maxiseal 4 To 4-Way Harness Adapter (Anderson Marine)
Maxiseal 4 To 4-Way Harness Adapter (Anderson Marine)
Converts 4-way round pin connector to 4-way flat pin connector. Easily adapts tow vehicle connector to trailer connector. Simply plug adapter into …
Your price: $4.25
List price: $8.29
In stock

Adapters With Built-In Back-Up Alarm (Wesbar)
Adapters With Built-In Back-Up Alarm (Wesbar)
Adapter with built-in 80 db. back-up alarm. Molded connectors to resist corrosion. Convenient OE connection.
Starting at: $16.95
List price: $25.69
In stock

Maxiseal Harness Adapters (Anderson Marine)
Maxiseal Harness Adapters (Anderson Marine)
Quick and easy to connect. Full-length plugs shall ensure positive latching; non-corrosive nylon shell and the insert eliminates make shift jumpers.
Starting at: $5.56
List price: $10.89
In stock

7-5 WAY ROUND ADAPTER
7 Round blade to 5 way flat adaptor with 16" lead cable. Links wiring to trailer wire and connects the two with no extensions. Fits most RVs, most …
Your price: $12.99
List price: $15.09
In stock

TRAILER ADAPTER 7 TO 5 WAY
Single piece. 7 Round blade to 5 flat female adaptor conveniently links a vehicle wiring system to a trailer wiring system. Fits RV's, most new …
Your price: $11.11
List price: $12.89
In stock

COILED ADAPTER-7WAY TO 5WAY 4'
Environmentally sealed 16 gauge coiled wire prevents tangling. Attractive marine yellow, no fade color. 7-Way mates with OE style 7-way blade …
Your price: $23.29
List price: $27.59
In stock

ADAPTER-EURO CARS 7WAY TO 7WAY
7-Way Flat Pin to 7-Flat Pin adapter w/LED lamp out by-pass for European vehicles. For vehicles with trailer lamp-out sensors, such as: Audi, …
Your price: $20.00
List price: $23.99
In stock

ADAPTER-EURO CARS 7WAY TO 5WAY
7-Way flat pin to 5-way flat adapter w/LED lamp out by-pass for European vehicles with trailer lamp-out sensors, such as: Audi, Mercedes-Benz …
Your price: $10.30
List price: $12.29
In stock

7-Way Trailer to 5-Way Flat Car End, 8' - Cequent Trailer Products - Wesbar
7-Way Trailer to 5-Way Flat Car End, 8' - Cequent Trailer Products - Wesbar
Environmentally sealed 16 gauge coiled wire prevents tangling. Attractive marine yellow, no fade color. 7-way mates with OE style 7-way blade …
Your price: $26.06
List price: $36.23
In stock

Round Adapter with 8" Wire - Seachoice
Adapter mates 7-way vehicle to 4 or 5-way trailer.
Starting at: $12.76
List price: $15.95
In stock

Round Adapter with 18" Cable - Seachoice
Adapter mates 7-way vehicle to 4 or 5-way trailer.
Starting at: $12.76
List price: $15.95
In stock

21 Items
End of Summer Savings During our Huge Fall Boatful of Savings Sale - Stock Up Now & Save!