{"product_id":"auto-parts-prodigy-21-circuit-universal-wiring-harness-kit-gm-color-coded-gxl125-wires-for-classic-cars","title":"Auto Parts Prodigy 21-Circuit Universal Wiring Harness Kit - GM Color-Coded GXL125 Wires for Classic Cars","description":"\u003cp\u003e\u003cstrong\u003eAuto Parts Prodigy 21-circuit universal wiring harness kit supplies a complete, GM color-coded wiring solution for hot rods, rat rods and classic restorations.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhether you're rebuilding a Chevy, Mopar, Ford or custom chassis, this full-featured wiring kit brings labeled, extra-long GXL 125 wires and detailed installation pages to simplify electrical work. It covers common circuits found on classic and custom vehicles, uses high-temperature cross-linked polyethylene insulation for durability, and includes connectors and documentation tailored to GM, Ford and Mopar layouts. Professional installation is recommended for complex systems, but hobbyists will appreciate the organized color coding and comprehensive circuit coverage.\u003c\/p\u003e\n\n\u003ch3\u003eWhich circuits are included and will it handle my car's accessories?\u003c\/h3\u003e\n\u003cp\u003eThis harness covers 21 essential circuits so you can wire most factory-style accessories and common aftermarket components. It includes power, lighting, ignition and convenience circuits used in many classic builds.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHorn, headlights, turn signals, brake and backup lights\u003c\/li\u003e\n  \u003cli\u003eGauges, radio, dome light, trunk light and cigarette lighter\u003c\/li\u003e\n  \u003cli\u003eWipers, fan, choke, coil and cruise control connections\u003c\/li\u003e\n  \u003cli\u003ePower windows, electric fuel pump, door locks and hazard lights\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the GM color coding help during installation?\u003c\/h3\u003e\n\u003cp\u003eWires are coded to GM color standards, making it faster to match circuits and trace wiring paths during routing and troubleshooting. Clear color conventions reduce guesswork and speed up both initial installs and later repairs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eColor-coded insulation for each circuit simplifies identification\u003c\/li\u003e\n  \u003cli\u003eReduces time spent tracing wires behind dash or in the engine bay\u003c\/li\u003e\n  \u003cli\u003eCompatible wiring diagrams for GM, Ford and Mopar provided\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the build quality and materials—are these wires durable?\u003c\/h3\u003e\n\u003cp\u003eThe harness uses GXL 125 wire with cross-linked polyethylene jacketing designed to withstand heat and exposure to automotive fluids. The construction is intended for long-term use in classic cars and custom builds, offering better resistance than basic PVC-insulated wires.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eGXL 125 high-temp wire resists grease, oil, gas and acids\u003c\/li\u003e\n  \u003cli\u003eExtra-long leads accommodate varied chassis and custom routing\u003c\/li\u003e\n  \u003cli\u003eMultiple connector types included for common terminals and components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this kit fit my specific make—what support is included?\u003c\/h3\u003e\n\u003cp\u003eThe kit is universal and includes specific instruction pages for GM, Ford and Mopar to guide placement and connections. While it suits many classic cars and hot rod builds, modifications or professional help might be needed for non-standard equipment or modern ECU integrations.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDetailed instructions with GM, Ford and Mopar-specific pages\u003c\/li\u003e\n  \u003cli\u003eUniversal layout adaptable to various chassis and body styles\u003c\/li\u003e\n  \u003cli\u003eRecommended professional install for advanced or electronic systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Auto Parts Prodigy’s 21-circuit universal wiring harness is aimed at classic car enthusiasts, hot rod builders and restoration shops that want a near-complete, color-coded wiring solution. It suits hobbyists comfortable with basic wiring and professionals who need a durable, organized harness with extra length and manufacturer-style color coding to speed installation and reduce wiring errors.\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: Is this harness ready for modern engine management systems?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This universal kit covers classic circuits but does not include ECU-specific wiring. Use it for traditional accessories and consult an expert for modern engine management integration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are wires heat- and chemical-resistant?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit uses GXL 125 cross-linked polyethylene wire rated to resist heat, grease, oil, gas and acids.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Auto Parts Prodigy","offers":[{"title":"Default Title","offer_id":48081501192350,"sku":"B07Z8CC4GJ","price":183.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/auto-parts-prodigy-front-packaging.jpg?v=1785806877","url":"https:\/\/northtrailauto.ca\/products\/auto-parts-prodigy-21-circuit-universal-wiring-harness-kit-gm-color-coded-gxl125-wires-for-classic-cars","provider":"North Trail Auto","version":"1.0","type":"link"}