{"product_id":"haltech-nexus-s2-s3-plug-n-play-adapter-harness-1","title":"Haltech NEXUS S2\/S3 Plug-n-Play Adapter Harness","description":"\u003cdiv\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003eHT-186331\u003c\/span\u003e   |   \u003cstrong\u003eUPC:\u003c\/strong\u003e 9356450015189\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch4\u003e\u003cstrong\u003eHaltech HT-186331 NEXUS S2\/S3 Plug-and-Play Adapter Harness\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe Haltech HT-186331 NEXUS S2\/S3 Plug-and-Play Adapter Harness provides a fully terminated, vehicle-specific wiring solution for installing the NEXUS S2 or S3 ECU into popular performance platforms without cutting factory harnesses. This adapter connects directly to the OEM ECU connector and includes all necessary breakout leads for Haltech CAN, power, ground, ignition, injectors, sensors, and auxiliary outputs for a true plug-and-play upgrade that retains full OEM functionality while unlocking NEXUS-level tuning control.\u003c\/p\u003e\n\u003cp\u003eBuilt with high-temperature TXL automotive wire, OEM-style connectors, and Haltech’s signature braided shielding, the harness is designed for extreme under-hood conditions and supports 1,500+ HP builds with zero voltage drop or signal interference. Pre-labeled wires and included detailed pin-out diagrams make installation straightforward for professional tuners and experienced enthusiasts.\u003c\/p\u003e\n\u003cp\u003eFor owners upgrading to NEXUS S2\/S3 who demand the cleanest, most reliable wiring solution, the HT-186331 adapter harness is the factory-engineered, plug-and-play bridge trusted on championship-winning race cars worldwide.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eFull plug-and-play – no cutting factory harness\u003c\/li\u003e\n\u003cli\u003eHigh-temp TXL wire with braided shielding\u003c\/li\u003e\n\u003cli\u003eOEM-style connectors and pre-terminated ends\u003c\/li\u003e\n\u003cli\u003eSupports NEXUS S2 \u0026amp; S3 ECU installations\u003c\/li\u003e\n\u003cli\u003ePre-labeled wires with detailed pin-out diagram\u003c\/li\u003e\n\u003cli\u003eCompatible with 1,500+ HP applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eVehicle-specific – confirm compatibility with Haltech\u003c\/li\u003e\n\u003cli\u003eRequires NEXUS S2 or S3 ECU (sold separately)\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCalifornia Proposition 65:\u003c\/strong\u003e Contains chemicals known to the State of California to cause cancer or reproductive harm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e Limited lifetime against manufacturing defects to original purchaser.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional installation recommended\u003c\/li\u003e\n\u003cli\u003eUnplug factory ECU and plug in adapter harness\u003c\/li\u003e\n\u003cli\u003eConnect NEXUS S2\/S3 to adapter harness\u003c\/li\u003e\n\u003cli\u003eRoute and secure harness away from heat\/moving parts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eThis Part Fits\u003c\/h4\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"5\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eECU Upgrade\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePopular Performance Platforms (Verify Compatibility)\u003c\/td\u003e\n\u003ctd\u003eNEXUS S2 \/ S3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: Vehicle-specific harness – contact Haltech for exact fitment list.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch4\u003eWhat's Included in the Purchase\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e(1) NEXUS S2\/S3 Plug-and-Play Adapter Harness\u003c\/li\u003e\n\u003cli\u003ePin-Out Diagram \u0026amp; Installation Instructions\u003c\/li\u003e\n\u003cli\u003ePart Number: Haltech HT-186331\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWhy Choose Haltech?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOver 30 years of motorsport ECU leadership\u003c\/li\u003e\n\u003cli\u003eEngineered for 1,500+ HP race \u0026amp; street applications\u003c\/li\u003e\n\u003cli\u003eTrusted in Formula Drift, V8 Supercars, and Dakar Rally\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Does this fit my car?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Vehicle-specific – check Haltech compatibility chart\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Cutting factory harness required?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No – true plug-and-play design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Includes ECU?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No – harness only, NEXUS S2\/S3 sold separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eShipping \u0026amp; Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e UPS or Fed Ex Ground.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e Typically ships same day or next if in stock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Protective retail box.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Haltech","offers":[{"title":"Default Title","offer_id":43840468123727,"sku":"HALHT-186331","price":535.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/haltech-ht186331-harness_01.jpg?v=1764601476","url":"https:\/\/www.blackopsautoworks.com\/products\/haltech-nexus-s2-s3-plug-n-play-adapter-harness-1","provider":"Black Ops Auto Works","version":"1.0","type":"link"}