{"product_id":"opt7-7-pin-to-4-pin-harness-uscar-plug-and-play-adapter-with-reverse-wire-weatherproof","title":"OPT7 7-Pin to 4-Pin Harness (USCAR) — Plug-and-Play Adapter with Reverse Wire, Weatherproof","description":"\u003cstrong\u003eOPT7 Easy Connect USCAR 7-Pin to 4-Pin Harness with reverse wire is a plug-and-play adapter that converts a USCAR 7-way vehicle socket to a 4-pin trailer connection, including reverse light functionality.\u003c\/strong\u003e\n\n\u003cp\u003eIf your truck has an aftermarket USCAR 7-way outlet and you need a simple, weatherproof way to power a 4-pin trailer or tailgate light bar, this OPT7 harness provides a no-splice solution. It delivers Ground, Running, Left\/Right Turn, Brake, and Reverse signals through heavy-duty 16-gauge pure copper wiring. Designed to work with popular trucks that lack a factory tow package, the harness is built for road-ready reliability and easy installation.\u003c\/p\u003e\n\n\u003ch3\u003eWhich vehicles will this OPT7 harness work with?\u003c\/h3\u003e\n\u003cp\u003eThis harness fits many trucks equipped with a USCAR 7-way socket and is intended for aftermarket wiring setups rather than factory tow packages. It supports a wide range of model years from multiple manufacturers, but is not universal—double-check your vehicle’s socket type before purchase.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible: 2007–2025 Toyota Tacoma\/Tundra; 2005–2014 Ford F-150\/F-250\/F-350; Dodge Ram; Chevy Silverado and GMC Sierra 1500\/2500\/3500; 2005–2022 Chevy Colorado and GMC Canyon\u003c\/li\u003e\n  \u003cli\u003eNot compatible: 2015+ Ford F-150, newer Ram and Silverado\/Sierra variants, or 2023+ Colorado\/Canyon models\u003c\/li\u003e\n  \u003cli\u003eRequires: vehicle equipped with a USCAR 7-way socket (aftermarket sockets typical)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does installation work—do I need tools or splicing?\u003c\/h3\u003e\n\u003cp\u003eInstallation is designed to be tool-light and straightforward: the harness plugs into an existing USCAR 7-way socket and provides a 4-pin plug for your trailer or tailgate light strip. No splicing or electrical modifications are required when paired with compatible sockets and devices, making it suitable for quick DIY installs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTrue plug-and-play—insert into USCAR 7-way socket and clip 4-pin into trailer or light bar\u003c\/li\u003e\n  \u003cli\u003eErgonomic tab for easier grip when plugging or unplugging\u003c\/li\u003e\n  \u003cli\u003eWorks seamlessly with OPT7 Redline Tailgate Light Bar and most 4-pin trailer connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat durability and safety features are included?\u003c\/h3\u003e\n\u003cp\u003eThe harness uses 16-gauge pure copper wiring inside heavy-duty PVC sheathing for reliable electrical flow and long-term endurance. Terminals resist rust and the assembly includes a dual-mechanism 7-pin security system plus a weatherproof cap to keep moisture and road grime out of the connection.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e16-gauge heavy-duty pure copper wiring for stable conductivity\u003c\/li\u003e\n  \u003cli\u003eRust-resistant terminals and dual security mechanism for a firm connection\u003c\/li\u003e\n  \u003cli\u003eWeatherproof cap and durable PVC jacket for all-weather protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this harness support multi-function lighting, including reverse lights?\u003c\/h3\u003e\n\u003cp\u003eYes—this adapter maps the vehicle’s signal circuits to the 4-pin output so your trailer or accessory receives running, turn, brake and reverse signals in addition to ground. That lets multi-function LED strips and standard trailer lights operate correctly without extra converters.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDelivers Ground, Running Light, Left\/Right Turn, Brake, and Reverse signals\u003c\/li\u003e\n  \u003cli\u003eIdeal for tailgate light bars and basic trailer lighting needs\u003c\/li\u003e\n  \u003cli\u003eNo additional converters needed when used with compatible lights\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The OPT7 Easy Connect USCAR 7-Pin to 4-Pin Harness is aimed at truck owners who have an aftermarket USCAR 7-way socket and need a reliable, weather-resistant way to power a 4-pin trailer or LED tailgate light bar without cutting or splicing wires. It’s a strong fit for DIY installers, fleet operators, and anyone pairing an OPT7 Redline Tailgate Light Bar with a vehicle that lacks a factory tow package. Note vehicle compatibility carefully—this harness is not universal and excludes several newer factory-equipped models.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need to splice wires to install this harness?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No—this OPT7 harness is plug-and-play for vehicles with a USCAR 7-way socket and requires no splicing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this work with my 2016 F-150?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No, it's not compatible with 2015+ F-150 models; verify your vehicle and socket type before purchase.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"OPT7","offers":[{"title":"Default Title","offer_id":67586672492729,"sku":"B0CNFZ7TBH","price":125.54,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/opt7-harness-front-view.jpg?v=1790489559","url":"https:\/\/redleafauto.ca\/products\/opt7-7-pin-to-4-pin-harness-uscar-plug-and-play-adapter-with-reverse-wire-weatherproof","provider":"Redleaf Auto","version":"1.0","type":"link"}