Trailers require electrical hook-ups that make towing safer for you and others on the road. In fact, while each state has its own laws and regulations governing everything from size limits to weight restrictions, the one thing they all have in common is that your trailer must be wired for tail lights, brake lights and turn signals. This is accomplished by connecting your trailer to your vehicle’s electric system. Unfortunately, not all trailer electrical wiring is compatible with the wires of your car, truck, van or SUV. Fortunately, REESE® Towpower manufactures a full line of trailer electrical components for everything you need to get your trailer lights up and running for safe towing. We manufacture T-Connectors, wiring converters, wiring connectors, adapters, brake controls and more to make towing safe for you and the drivers around you. Best of all, our products install quickly and easily with simple do-it-yourself instructions.

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  • Adapter 7-Way to 4 and 5 Flat

    Adapter 7-Way to 4 and 5 FlatAdapter 7-Way to 4 and 5 FlatAdapter 7-Way to 4 and 5 FlatAdapter 7-Way to 4 and 5 Flat

    Part Number: 8521211

    Product Description
    REESE Towpower adapters allow for quick connections of different trailer wring. This adapter allows connection of either 4 or 5-way flat trailer plug to vehicles with 7-way receptacles. It is designed for use with boat and utility trailers with certain hydraulic surge brakes and /or backup lights.


    • 7-Way Blade to 5 or 4-Flat Adapter
    • Designed for use with boat and utility trailers
    • For use with hydraulic surge brakes and/or back up lights
    • Compatible with plastic or metal connectors
    • Features non corroding brass contacts


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    Cequent Consumer Products offers a REESE Limited and a REESE Limited Lifetime warranty on some products. See our product warranty page for specific details.

    Cequent Consumer Products are distributed through our network of fine retail partners. Available in the United States and Canada you will find our top selling brands in stores and on the web. See our Network of Fine Retail Partners.

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