{"product_id":"tekonsha-118304-t-one-4-way-flat-harness-w-converter","title":"Tekonsha 118304 T-One 4-Way Flat Harness w\/Converter","description":"\u003cp class=\"nvn-hero\"\u003eThe Tekonsha 118304 is a T-One T-Connector harness that gives your 2004-2010 Toyota Sienna a clean 4-way flat trailer connector. It plugs straight into the factory wiring behind the taillight, no cutting or splicing, and the built-in converter with circuit protection keeps the van's electronics safe while it powers the trailer lights.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eIf you tow with a 2004-2010 Toyota Sienna, this is about the easiest wiring job you'll ever do. The Tekonsha 118304 T-One T-Connector is a custom-fit harness, built to match the factory wiring on that generation of Sienna. No test light, no splicing, no scotch-locks. You find the plug behind the taillight, unplug it, and drop the T-Connector inline. Ten minutes, maybe less if you've done one before.\u003c\/p\u003e\n\u003cp\u003eHere's what makes the T-One design nice. Instead of tapping into your van's wiring and hoping the connection holds up, it uses the plug-and-play connectors that are already there. That means a solid, weatherproof link that isn't going to corrode or work loose the first time you hit a bump. The 4-way flat plug on the output is the standard connector for small trailers, so it'll match most utility trailers, small boat trailers, and pop-up campers right out of the gate.\u003c\/p\u003e\n\u003cp\u003eThe built-in converter is the part that matters if you care about your electronics. A lot of newer vehicles run separate turn and brake signals, and wiring a trailer straight into that can back-feed and confuse the van's computer. This harness runs a powered converter that pulls current from the battery instead of the taillight circuit, and the circuit protector guards against shorts and overloads if a trailer plug gets wet or a bulb fails. Your Sienna's factory lighting stays isolated and safe.\u003c\/p\u003e\n\u003cp\u003eIt comes with the 4-flat plug and a dust cap to keep the contacts clean when you're not towing. The wire is a bonded run that tucks up out of the way. This is a Tow Ready assembly from Tekonsha, the same folks who build the brake controllers and towing electronics that hold up season after season. If you're adding a hitch to a Sienna and need lights on the trailer, this is the connector that gets you there without a wiring headache.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003eT-One custom-fit T-Connector for the 2004-2010 Toyota Sienna, matched to the factory harness for a plug-in install with no cutting or splicing.\u003c\/li\u003e\n  \u003cli\u003e4-way flat output connector, the standard plug for small utility, boat, and pop-up camper trailers.\u003c\/li\u003e\n  \u003cli\u003eBuilt-in powered converter pulls from the battery so the van's separate turn and brake signals reach the trailer correctly.\u003c\/li\u003e\n  \u003cli\u003eCircuit protector guards against shorts and overloads from a wet plug or failed bulb, keeping the Sienna's factory lighting isolated.\u003c\/li\u003e\n  \u003cli\u003eWeatherproof plug-and-play connectors resist corrosion and stay put over rough roads.\u003c\/li\u003e\n  \u003cli\u003eIncludes the 4-flat plug and a dust cap to keep the contacts clean between tows.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Tekonsha reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat vehicle does the Tekonsha 118304 fit?\u003c\/summary\u003e\n    \u003cp\u003eIt's a custom-fit T-One harness for the 2004-2010 Toyota Sienna. The connectors are matched to that van's factory wiring, so it plugs straight in behind the taillight.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDo I need to cut or splice any wires?\u003c\/summary\u003e\n    \u003cp\u003eNo. The T-One design uses the plug-and-play connectors already in your Sienna. You unplug the factory connection, insert the T-Connector inline, and you're done. No test light or splicing needed.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat does the converter do?\u003c\/summary\u003e\n    \u003cp\u003eThe Sienna runs separate turn and brake signals. The built-in converter pulls power from the battery and combines those signals into the standard 4-way flat output, so the trailer lights work right without back-feeding the van's electronics.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat size trailer connector does it use?\u003c\/summary\u003e\n    \u003cp\u003eA 4-way flat, the most common connector on small trailers. It handles running lights, brake lights, and turn signals for utility trailers, small boat trailers, and pop-up campers.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes the circuit protector do anything I'll notice?\u003c\/summary\u003e\n    \u003cp\u003eIt works in the background. If a trailer plug gets wet and shorts, or a bulb fails, the protector keeps the fault from reaching the Sienna's factory lighting. You just won't blow a fuse in the van.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs there anything to keep the plug clean when I'm not towing?\u003c\/summary\u003e\n    \u003cp\u003eYes, it comes with a dust cap that snaps over the 4-flat plug to keep dirt and moisture off the contacts between trips.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003e4-Way Flat Replacement for OEM Wiring Harness with Circuit Protector Converter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eTekonsha\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e118304\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e016118057966\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProduct Line\u003c\/th\u003e\n\u003ctd\u003eT-One\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003eTow Ready\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eTrailer Connector\u003c\/th\u003e\n\u003ctd\u003e4-Way Flat\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eConverter\u003c\/th\u003e\n\u003ctd\u003eCircuit Protector Converter, built-in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eInstallation\u003c\/th\u003e\n\u003ctd\u003ePlug-in replacement for OEM wiring harness\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eVehicle Application\u003c\/th\u003e\n\u003ctd\u003e2004-2010 Toyota Sienna\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What vehicle does the Tekonsha 118304 fit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's a custom-fit T-One harness for the 2004-2010 Toyota Sienna. 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