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Free Shipping over $99

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Free Shipping over $99

Orders $99 or more ship free within the contiguous U.S.
May not apply to engines or oversized orders.

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Earn up to 1.5 points for every $1 spent. That’s up to 4.5% back that you can redeem and save on future orders. Excludes engine sales.

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Ready To Serve

Our top priority is your ultimate satisfaction, and to get you back to boating as soon as possible.

Contact a Parts Pro

SALE - Trailer Adapters & Wiring Harnesses

(115 products)
  • 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

    $10.12
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  • Boating Essentials - 4 Way 25 FT Trailer Wiring Harness - BE-TR-59372-DP

    T-H MARINE

    Boating Essentials - 4 Way 25 FT Trailer Wiring Harness - BE-TR-59372-DP

    $27.99
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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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  • Anderson Marine - 7-To-4-Way Harness Adapter - E5414

    ANDERSON

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

    $16.90
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  • Sea Choice - 4Way Flat Trailer Harness 24"Trailer Side With Separate Tail Light Wires - 57971

    SEACHOICE

    Sea Choice - 4Way Flat Trailer Harness 24"Trailer Side With Separate Tail Light Wires - 57971

    $11.69 $12.55
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  • 5-FLAT TO 7-ROUND COIL CORD ADAPTOR (FULTYME RV) - 1174

    FULTYME RV

    5-FLAT TO 7-ROUND COIL CORD ADAPTOR (FULTYME RV) - 1174

    $50.43
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  • Pollak Corp - 7-4 WAY ADAPTER,7-WAY TO 4 WAY CONNECTOR ADAPTER - 12716EP

    POLLAK CORP

    Pollak Corp - 7-4 WAY ADAPTER,7-WAY TO 4 WAY CONNECTOR ADAPTER - 12716EP

    $9.12
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  • 4-FLAT TO 5-FLAT TRAILER WIRING ADAPTER (FULTYME) - 2003

    FULTYME RV

    4-FLAT TO 5-FLAT TRAILER WIRING ADAPTER (FULTYME) - 2003

    $13.48 $15.99
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  • Forespar - Lanocote Rust & Corrosion Solution - 16 oz. - 770003

    Forespar Performance Products

    Forespar - Lanocote Rust & Corrosion Solution - 16 oz. - 770003

    $34.93 $36.45
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  • Anderson Marine - 4-Way Trailer Harness Kit 25' - V5425Y

    ANDERSON

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

    $34.74
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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

    $63.21 $72.59
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  • Sea Choice - 4Way Wishbone Style Wiring Harness 25' - 52961

    SEACHOICE

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

    $20.29 $21.80
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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

    $77.38 $83.10
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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

    $11.00 $11.65
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  • Anderson Marine - 4 Way Flat Tester - V5411

    ANDERSON

    Anderson Marine - 4 Way Flat Tester - V5411

    $7.07
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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

    $12.33 $14.89
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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

    $48.74
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  • Anderson Marine - Peterson 7 To 60Way Harness Adapter - V5417

    ANDERSON

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

    $16.76
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  • Anderson Marine - 7-To-5-Way Harness Adapter - E5415

    ANDERSON

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

    $19.78 $20.39
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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

    $42.45
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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

    $29.02
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  • 2-WAY FLAT CONNECTOR (ANCOR) - 249102

    Ancor

    2-WAY FLAT CONNECTOR (ANCOR) - 249102

    $4.69
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  • Sea Choice - 5Way Flat Connector Cover - 57951

    SEACHOICE

    Sea Choice - 5Way Flat Connector Cover - 57951

    $1.71 $1.84
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  • FLAT CONNECTOR COVER (FULTYME) - 2018

    FULTYME RV

    FLAT CONNECTOR COVER (FULTYME) - 2018

    $1.64 $1.99
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  • FLAT CONNECTOR COVER (FULTYME) - 2035

    FULTYME RV

    FLAT CONNECTOR COVER (FULTYME) - 2035

    $6.40
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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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  • 4-WAY FLAT CONNECTORS (FULTYME) - 2020

    FULTYME RV

    4-WAY FLAT CONNECTORS (FULTYME) - 2020

    $8.72
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  • Sea Choice - 4Way Flat Connector 12"Trailer Side - 57851

    SEACHOICE

    Sea Choice - 4Way Flat Connector 12"Trailer Side - 57851

    $9.55 $10.25
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  • Sea Choice - 5Way Flat Connector60" - 57961

    SEACHOICE

    Sea Choice - 5Way Flat Connector60" - 57961

    $20.02 $21.50
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  • Sea Choice - 4Way Flat Trailer Harness 60"Car and Trailer Side Loop - 57931

    SEACHOICE

    Sea Choice - 4Way Flat Trailer Harness 60"Car and Trailer Side Loop - 57931

    $14.02 $15.06
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  • Sea Choice - 4Way Flat Trailer Harness 48"Car Side for 2Wire Systems - 57841

    SEACHOICE

    Sea Choice - 4Way Flat Trailer Harness 48"Car Side for 2Wire Systems - 57841

    $8.78 $9.43
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  • 4-WAY FLAT CONNECTORS (FULTYME) - 2007

    FULTYME RV

    4-WAY FLAT CONNECTORS (FULTYME) - 2007

    $8.05
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  • Sea Choice - 4Way Flat Trailer Harness 48"Trailer Side - 57901

    SEACHOICE

    Sea Choice - 4Way Flat Trailer Harness 48"Trailer Side - 57901

    $12.59 $13.53
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  • 4-WAY FLAT CONNECTORS (FULTYME) - 2016

    FULTYME RV

    4-WAY FLAT CONNECTORS (FULTYME) - 2016

    $12.86
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  • 4-WAY FLAT CONNECTORS (FULTYME) - 2013

    FULTYME RV

    4-WAY FLAT CONNECTORS (FULTYME) - 2013

    $8.38
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  • 4-WAY FLAT CONNECTORS (FULTYME) - 2008

    FULTYME RV

    4-WAY FLAT CONNECTORS (FULTYME) - 2008

    $7.19
    Learn More