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Trailer Adapters & Wiring Harnesses

(148 products)

PartsVu is proud to carry a range of trailer accessories including trailer adapters and trailer wiring harnesses from leading manufacturers such as Seachoice, Wesbar, Sierra, RV Pigtails, Pollak Corporation, Hopkins Manufacturing, Attwood Marine, and others.

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  • Wesbar - 4-Way Flat Wiring Connector - Trailer End - 18 inch Wishbone Harness - 18 inch Ground Wire - 707286

    Wesbar

    Wesbar - 4-Way Flat Wiring Connector - Trailer End - 18 inch Wishbone Harness - 18 inch Ground Wire - 707286

    $17.17
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  • Wesbar 4-Way Flat 25 FT. Trailer End - Wishbone Harness - 3 FT. Ground - 707261

    Wesbar

    Wesbar 4-Way Flat 25 FT. Trailer End - Wishbone Harness - 3 FT. Ground - 707261

    (1)
    $36.25
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  • Wesbar 7-Way Trailer To 5-Way Flat Car End Coiled Jumper w/ 8ft Cable - 787196

    Wesbar

    Wesbar 7-Way Trailer To 5-Way Flat Car End Coiled Jumper w/ 8ft Cable - 787196

    $64.60
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  • 2-WAY FLAT CONNECTOR (ANCOR) - 249111

    Ancor

    2-WAY FLAT CONNECTOR (ANCOR) - 249111

    $2.88 $4.49
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  • Wesbar - 5-Flat Connector Harness - Trailer End - 702405

    Wesbar

    Wesbar - 5-Flat Connector Harness - Trailer End - 702405

    $16.67
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  • Wesbar 7-Way Trailer to 5-Way Flat Car End Coiled Jumper w/ 4ft cable - 787195

    Wesbar

    Wesbar 7-Way Trailer to 5-Way Flat Car End Coiled Jumper w/ 4ft cable - 787195

    $77.35
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  • Boating Essentials - Trailer Circuit Tester - BE-TR-59391-DP

    T-H MARINE

    Boating Essentials - Trailer Circuit Tester - BE-TR-59391-DP

    $5.59
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  • 2-WAY FLAT CONNECTOR (ANCOR) - 249112

    Ancor

    2-WAY FLAT CONNECTOR (ANCOR) - 249112

    $2.88 $4.49
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  • Wesbar - Wishbone Trailer Wiring Kit - 4 Way - 25 foot 707103

    Wesbar

    Wesbar - Wishbone Trailer Wiring Kit - 4 Way - 25 foot 707103

    $61.97
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  • Anderson Marine - 4-Way Trailer Harness Kit 25' - V5425Y

    ANDERSON

    Anderson Marine - 4-Way Trailer Harness Kit 25' - V5425Y

    $32.35
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  • Sea Choice - 4Way Wishbone Style Wiring Harness 25' - 52961

    SEACHOICE

    Sea Choice - 4Way Wishbone Style Wiring Harness 25' - 52961

    $19.69
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  • Sea Choice - 7Way Trailer Wiring 8' Cable With 7Way Molded Connector - 58111

    SEACHOICE

    Sea Choice - 7Way Trailer Wiring 8' Cable With 7Way Molded Connector - 58111

    $60.78
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  • Wesbar - Replacment Tail Light Wire Connector - 3 way - 12 inch - 719063

    Wesbar

    Wesbar - Replacment Tail Light Wire Connector - 3 way - 12 inch - 719063

    $10.62
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  • Attwood Marine - Wiring Harness/Connector 4-Way Flat, 18" Plug and 48" Socket - 76635

    Attwood Marine

    Attwood Marine - Wiring Harness/Connector 4-Way Flat, 18" Plug and 48" Socket - 76635

    $11.23
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  • Attwood Marine - 4 Way Trailer Connector 12" Plug - 140203

    Attwood Marine

    Attwood Marine - 4 Way Trailer Connector 12" Plug - 140203

    $9.16
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  • TRAILER PLUG TESTER (FULTYME RV) - 3070

    FULTYME RV

    TRAILER PLUG TESTER (FULTYME RV) - 3070

    $4.62
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  • Anderson Marine - 4 Way Flat Tester - V5411

    ANDERSON

    Anderson Marine - 4 Way Flat Tester - V5411

    $7.71
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  • Sea Choice - 7Way Round RV Style Trailer ConnectorCar Side - 57991

    SEACHOICE

    Sea Choice - 7Way Round RV Style Trailer ConnectorCar Side - 57991

    $14.43
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  • 7-WAY ROUND RV-STYLE CONNECTORS (FULTYME) - 2022

    FULTYME RV

    7-WAY ROUND RV-STYLE CONNECTORS (FULTYME) - 2022

    $15.26
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  • 7-WAY ROUND TO 5-WAY FLAT ROUND ADAPTER (OPTRONICS) - A75TBP

    OPTRONICS

    7-WAY ROUND TO 5-WAY FLAT ROUND ADAPTER (OPTRONICS) - A75TBP

    $15.95
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  • Sierra - Pigtail 1' Male - TC44054

    SIERRA

    Sierra - Pigtail 1' Male - TC44054

    $7.83
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  • Sierra - 4 Flat Conn 60 Wr/18Ga 2 Plu - WH10350

    SIERRA

    Sierra - 4 Flat Conn 60 Wr/18Ga 2 Plu - WH10350

    $10.14
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  • Pollak Corp - 7WAY RV TRAILER CIRCUIT TESTER,7-WAY RV TRAILER CIRCUIT TESTER - 12741EV

    POLLAK CORP

    Pollak Corp - 7WAY RV TRAILER CIRCUIT TESTER,7-WAY RV TRAILER CIRCUIT TESTER - 12741EV

    $54.02
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  • Wesbar - 7-Way Blade Tester and Trailer Emulator w/LED Display - 767943

    Wesbar

    Wesbar - 7-Way Blade Tester and Trailer Emulator w/LED Display - 767943

    $85.41
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  • Anderson Marine - 7-To-5-Way Harness Adapter - E5415

    ANDERSON

    Anderson Marine - 7-To-5-Way Harness Adapter - E5415

    $21.59
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  • Anderson Marine - 7-To-4-Way Harness Adapter - E5414

    ANDERSON

    Anderson Marine - 7-To-4-Way Harness Adapter - E5414

    $16.55
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  • Anderson Marine - Peterson 7 To 60Way Harness Adapter - V5417

    ANDERSON

    Anderson Marine - Peterson 7 To 60Way Harness Adapter - V5417

    $19.09
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  • Pollak Corp - 7WAY PIN PLUG TO 7WAY RV SOCKE,7-WAY PIN PLUG TO 7-WAY RV SOCKET - 12724EP

    POLLAK CORP

    Pollak Corp - 7WAY PIN PLUG TO 7WAY RV SOCKE,7-WAY PIN PLUG TO 7-WAY RV SOCKET - 12724EP

    $44.95
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  • Pollak Corp - 4WAY FLAT TO 7WAY RV SOCKET AD,4-WAY FLAT TO 7-WAY RV SOCKET ADAPTER - 12723EP

    POLLAK CORP

    Pollak Corp - 4WAY FLAT TO 7WAY RV SOCKET AD,4-WAY FLAT TO 7-WAY RV SOCKET ADAPTER - 12723EP

    $29.93
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  • Pollak Corp - 6WAY ROUND PLUG TO 7WAY SOCKET,6-WAY ROUND PLUG TO 7-WAY SOCKET - 12725EP

    POLLAK CORP

    Pollak Corp - 6WAY ROUND PLUG TO 7WAY SOCKET,6-WAY ROUND PLUG TO 7-WAY SOCKET - 12725EP

    $32.10
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  • 3-WAY FLAT CONNECTOR (ANCOR) - 249114

    Ancor

    3-WAY FLAT CONNECTOR (ANCOR) - 249114

    $3.85
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  • 3-WAY FLAT CONNECTOR (ANCOR) - 249113

    Ancor

    3-WAY FLAT CONNECTOR (ANCOR) - 249113

    $3.81
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  • 2-WAY FLAT CONNECTOR (ANCOR) - 249102

    Ancor

    2-WAY FLAT CONNECTOR (ANCOR) - 249102

    $4.17
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  • Sea Choice - 4Way Flat Connector Cover - 58121

    SEACHOICE

    Sea Choice - 4Way Flat Connector Cover - 58121

    $4.83
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  • FLAT CONNECTOR COVER (FULTYME) - 2018

    FULTYME RV

    FLAT CONNECTOR COVER (FULTYME) - 2018

    $1.60
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  • Sea Choice - 5Way Flat Connector Cover - 57951

    SEACHOICE

    Sea Choice - 5Way Flat Connector Cover - 57951

    $1.23
    Learn More

PartsVu offers a full range of Boat Trailer Parts and Accessories to help you maintain your trailer. Follow these links to find: Boat Trailer Lights; Boat Trailer Bow Rollers & Stops; Trailer Adapters & Wiring Harnesses; Boat Trailer Jacks; Boat Trailer Hubs, Brakes & Bearings; Boat Trailer Balls & Couplers; Boat Trailer Hitches; Boat Trailer Accessories, Chocks & Tires; Boat Trailer Hardware, Brackets, Springs & Bolts; Boat Trailer Guides & Poles; Boat Trailer Bunk, Boards & Components; Boat Trailer Straps, Winches & Safety Chains.

Everything you need to know about wiring a Boat Trailer is featured in this article from the PartsVU Exchange.

Here's some great information about how to secure your boat trailer safely for the ride home.

Check out all of the great Boat Trailering Tips & Resources available at the PartsVU Exchange.