{"product_id":"oyviny-brake-controller-wiring-adapter-3040-for-toyota-lexus-4-pin-plug-31-inch-harness","title":"Oyviny Brake Controller Wiring Adapter 3040 for Toyota \u0026 Lexus — 4‑Pin Plug, 31-inch Harness","description":"\u003cp\u003e\u003cstrong\u003eThe Oyviny 3040 Brake Controller Wiring Adapter is a plug-and-play 4-pin harness that lets compatible Toyota and select Lexus models accept aftermarket electric trailer brake controllers without cutting or splicing vehicle wiring.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf you tow trailers with electric brakes, installing a dedicated brake controller is often necessary for safe, controlled stops. The Oyviny 3040 harness is built to bridge many Toyota and Lexus models (Tundra, Tacoma, 4Runner, Sequoia, Land Cruiser and select GX\/LX years) to popular third-party brake controllers, simplifying installation and protecting the vehicle’s original wiring.\u003c\/p\u003e\n\n\u003ch3\u003eWhich vehicles and brake controllers work with this harness?\u003c\/h3\u003e\n\u003cp\u003eThis adapter supports a range of Toyota model years and specific Lexus models—refer to the compatibility picture for exact year-by-year fit. It uses the industry-standard 4-pin brake controller connector so it pairs with many well-known brake controllers from Tekonsha, Draw-Tite and Reese.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits: Toyota Tundra 2003–2014, Tacoma 2005–2015, 4Runner 2003–2013, Sequoia 2003–2022, Land Cruiser 2003–2021\u003c\/li\u003e\n  \u003cli\u003eSelect Lexus: GX460, GX470, LX470, LX570 (2003–2020 for select models)\u003c\/li\u003e\n  \u003cli\u003eCompatible controllers: Tekonsha P2\/P3\/Prodigy, Draw-Tite Activator series, Reese Towpower models, and similar 4-pin units\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow difficult is installation and what tools are needed?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward because the adapter is designed to plug directly into the vehicle’s factory brake controller port and the controller’s 4-pin plug. No wire cutting, splicing, or special crimping is required, which reduces installation time and risk to factory wiring.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePlug the harness into the brake controller, then into the factory port beneath the dash\u003c\/li\u003e\n  \u003cli\u003eNo soldering or wire modification needed—saves time and preserves factory wiring\u003c\/li\u003e\n  \u003cli\u003eBasic tools like a flashlight or trim tool may help access the dash port\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the construction and performance details of this adapter?\u003c\/h3\u003e\n\u003cp\u003eThe harness combines durable ABS plastic plugs and tin-plated copper terminals for reliable electrical contact and corrosion resistance. A protective nylon net tube shields the wires and reduces abrasion, while the 31-inch length gives room to position the controller where it’s convenient for the driver.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaterials: ABS plug bodies with tin-plated copper terminals for longevity\u003c\/li\u003e\n  \u003cli\u003eProtection: Black nylon net tubing guards against wear and minor impacts\u003c\/li\u003e\n  \u003cli\u003eLength: ~31 inches to allow flexible controller placement under the dash\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill using this adapter affect safety or vehicle electronics?\u003c\/h3\u003e\n\u003cp\u003eThe adapter is intended to maintain factory wiring integrity by avoiding splices that can introduce shorts or poor connections. While it facilitates installing a compatible brake controller, you should still follow the brake controller maker’s setup and calibration procedures for safe operation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaintains original harness integrity—no permanent vehicle wiring changes\u003c\/li\u003e\n  \u003cli\u003eReduces risk of cross-wiring and short circuits during installation\u003c\/li\u003e\n  \u003cli\u003eFinal brake control performance depends on the controller and proper setup\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Drivers who tow trailers with electric brakes and own a compatible Toyota or select Lexus model, but want an easier, cleaner installation of an aftermarket brake controller. It's ideal for owners who prefer to avoid cutting factory wiring, installers seeking a time-saving harness, and anyone who wants a durable plug-and-play connection to well-known brake controller brands.\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 cut my vehicle's wiring to install this adapter?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The Oyviny 3040 is a plug-and-play adapter that connects to the factory port without cutting or splicing wires.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Which brake controllers are compatible with this harness?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It works with many 4-pin standard controllers, including Tekonsha P2\/P3\/Prodigy, Draw-Tite Activator series, and Reese Towpower models.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Oyviny","offers":[{"title":"Default Title","offer_id":67593211642041,"sku":"B09MYLLYP4","price":58.77,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/oyviny-3040-front-plug-and-connector.jpg?v=1790573080","url":"https:\/\/redleafauto.ca\/products\/oyviny-brake-controller-wiring-adapter-3040-for-toyota-lexus-4-pin-plug-31-inch-harness","provider":"Redleaf Auto","version":"1.0","type":"link"}