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Trailer Wiring

      • Wesbar License Plate Bracket
        List Price: $2.19
        Starting At: $1.86

        Wesbar License Plate Bracket Choice of either black or white plastic license plate brackets to meet wide application needs. Made of economical high-impact, non-corrosive polypropylene for the most demanding applications. 1/4" Mounting holes on 2"...

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      • Anderson Boat Trailer Wiring Harness Adapter 7 To 4 Way
        List Price: $10.46
        Starting At: $8.37

        PLUG IN STYLE CONVERTER converts seven way blade connector to a four way molded connector. Allows one vehicle to tow either campers or boats. Quick and easy to connect. Full-length plug shell ensures positive latching. Features non corrosive nylon shell.

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      • 18" Trailer Connector Wunside Design 4-Way
        List Price: $6.10
        Now: $4.27

        Wesbar 18" Trailer Connector Wunside Design 4-Way Wesbar harnesses conform to all applicable SAE, NMMA, and TMA standards to provide years of dependable service. Standard 4-way harnesses have an 18" ground wire except where noted. Wesbar's 5-way plugs...

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      • 5 Way Wiring Harness Extension
        List Price: $10.88
        Starting At: $7.62

        Wesbar 5 Way Wiring Harness Extension Wesbar harnesses conform to all applicable SAE, NMMA and TMA standards to provide years of dependable service. Wesbar's 5-way plugs mate with all Wesbar 4-way plugs and will operate all DOT required lights...

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      • Westbar 7-Way Trailer to 5-Way Flat Car End Coiled Jumper- 4 Ft Cable
        List Price: $33.92
        Starting At: $23.75

        Westbar 7-Way Trailer to 5-Way Flat Car End Coiled Jumper- 4 Ft Cable Features: 4 Foot Cable Environmentally Sealed 16 gauge coiled wire prevents tangling. Attractive marine yellow, no fade color. 7-Way Mates with OE Style 7-Way Blade Connectors.

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      • Anderson Boat Trailer Wiring Harness Adapter 7 To 5 Way
        List Price: $10.95
        Now: $8.76

        Converts 7-Way Round blade connector to 5-Flat connector. Easily adapts tow vehicle connector to trailer connector. Simply plug adapter into tow vehicle connector and plug in trailer connector. Full length plug shell ensures positive latching. Maxiseal...

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      • Flat 4 Wiring Harness Extension
        List Price: $9.20
        Now: $6.44

        Flat 4 Wiring Harness Extension Wesbar harnesses conform to all applicable SAE, NMMA and TMA standards to provide years of dependable service. Standard 4-Way harnesses have an 18" ground wire except when noted. Double Ended 4-Way 2' Cord (4-Way flat...

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      • Wishbone 5-Way 4' Trailer Connector With 4' Ground
        List Price: $11.28
        Now: $7.89

        Wishbone 5-Way 4' Trailer Connector With 4' Ground Wesbar harnesses conform to all applicable SAE, NMMA, and TMA standards to provide years of dependable service. Standard 5-Way harnesses have a 5' blue wire (auxilliary circuit) and a 4' white wire...

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      • Wesbar 7-Way Blade to 5-Flat Plug Adapter
        List Price: $25.26
        Starting At: $17.68

        Wesbar 7-Way Blade to 5-Flat Plug Adapter Adapters for a quick switch from one style plug to another when towing multiple trailers. Best Selling Items Designed for 2' or 4' Wide x 4' High Areas Minimum Inventory for Maximum Turn Includes Reorder...

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      • Wishbone 25' Wiring Kit
        List Price: $31.04
        Now: $21.72

        Wishbone 25' Trailer Wiring Kit  25' trailer wishbone harness kit wit 4' trunk connector. Wesbar harnesses conform to all applicable SAE, NMMA, and TMA standards to provide years of dependable service. Standard 4-way harnesses have an 18" ground...

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      • Wesbar 7-Way Blade to 4-Flat with LED Circuit Tester
        List Price: $28.17
        Starting At: $19.72

        Wesbar 7-Way Blade to 4-Flat with LED Circuit Tester Features: Easily Adapt OEM 7-way blade connector to either 5-flat or a 4-flat connector. Instantly checks electrical circuit for connectivity. Displays connectivity using high visibility Blue...

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      • Wesbar 7-Way Blade to 4-Flat Plug Adapter
        List Price: $18.83
        Starting At: $13.18

        Wesbar 7-Way Blade to 4-Flat Plug Adapter Adapters for a quick switch from one style plug to another when towing multiple trailers. Specifications: Dimensions: 2.75" L x 3" W x 6.75" H Weight: 0.23 lbs.  

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      • 4' Trunk Connector 4-Way Harness
        List Price: $7.60
        Starting At: $5.32

        Wesbar 4' Trunk Connector 4-Way Harness Wesbar harnesses conform to all applicable SAE, NMMA, and TMA standards to provide years of dependable service. Standard 4-way harnesses have an 18" ground wire except where noted. Wesbar's 5-way plugs mate...

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      • 66" Trunk - Trailer Connector Kit
        List Price: $10.65
        Starting At: $7.45

        Wesbar 66" Trunk - Trailer Connector Kit Wesbar harnesses conform to all applicable SAE, NMMA, and TMA standards to provide years of dependable service. Standard 4-way harnesses have an 18" ground wire except where noted. Wesbar's 5-way plugs mate...

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      • 6' Trunk Connector 5-Way Harness
        List Price: $11.23
        Starting At: $7.86

        6' Trunk Connector with 6' ground 5-Way Harness. Standard 5-Way harnesses have a 5' blue wire (auxiliary circuit) and a 4' white wire (ground). Wesbar harnesses conform to all applicable SAE, NMMA, and TMA standards to provide years of dependable service...

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      • 7-Way Vehicle To 5-Way Trailer Adapter
        List Price: $28.73
        Now: $21.83

        7-Way Vehicle To 5-Way Trailer Adapter. Wesbar's 5-way plugs mate with all Wesbar 4-way plugs and will operate all DOT required lights.

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      Boat Trailer Wiring

      Boat trailers are exposed to the elements and heavy loads year 'round. Over time the light systems can fail. Obvious damage such as a cracked or broken lens is easy to spot and to replace. Issues with boat trailer wiring are more difficult to detect. If you suspect that your trailer may have degraded wiring, it might be easier and safer to replace the system than to spot repair. Wholesale Marine carries an inventory of trailer wiring kits from Anderson, Attwood, and Wesbar as well as adapters, light testers, extensions and harnesses. If you’re not sure exactly what you need, just ask our staff. We’ll be glad to assist you.

      If you need a trailer wishbone harness kit, we recommend the 25-foot harness made by Wesbar. It conforms to all SAE, NMMA and TMA-standards and offers long service life. If you just need a trunk rewire, Wesbar’s 66-Inch Trunk Trailer Connector Kit is all you’ll need.

      Your One Stop Shop for Boat Trailer Wiring & More!

      Maybe all you need are some replacement bulbs, maybe not. Be sure with Attwood’s Trailer 4-Way Light Tester. The light on the circuit tester quickly indicates which circuit is out- either tail lights, ground lights, or left or right turn signals so there’s no guesswork. If your trailer serves several purposes, towing your boat, RV, or camper, then you’ll need Anderson’s Boat Trailer Wiring Harness Adapter 7 to 4-Way. This way, you’ll only need to bring one vehicle with you on trips. A real time saver.

      Remember, whatever your boating life requires, from manual boat trailer jacks, to life vests, even boat trailer wiring, turn to Wholesale Marine for the best quality boating equipment at competitive prices. Be sure to ask about our Captain’s Loyalty program for additional discounts the next time you shop at Wholesale Marine! Call us at (877) 388-2628; we’re here Monday through Friday, from 9:00 AM until 6:00 PM EST.