{"product_id":"stdysun-12v-led-work-light-wiring-harness-kit-3-5m-14awg-40a-relay-switch-for-dual-light-bars","title":"STDYSUN 12V LED Work Light Wiring Harness Kit — 3.5m 14AWG, 40A Relay \u0026 Switch for Dual Light Bars","description":"\u003cp\u003e\u003cstrong\u003eSTDYSUN remote wiring harness kit connects two 12V LED work or driving lights to a dashboard switch with a 40A relay and a 3.5m 14AWG main cable for safe, reliable power delivery.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis plug-and-play wiring kit is built to manage dual LED light bars or fog lamps without altering your vehicle's original wiring. It bundles a keyed on\/off switch, heavy-duty 40A relay and blade fuse, and appropriately gauged 14AWG and 16AWG conductors in a single loom so installers get a tidy, protected run from battery to lights. Materials include copper conductors, durable PVC insulation and a universal connector to speed up fitting on cars, trucks and off-road rigs.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this harness simplify installation?\u003c\/h3\u003e\n\u003cp\u003eThe kit arrives pre-assembled so you avoid splicing multiple wires or sourcing separate relays and fuses. A single battery-positive lead and a ground make the main power connection straightforward, while the included plug-in switch controls the relay remotely. The 3.5 meter length allows flexible routing through engine bays and cabin firewalls.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePre-wired loom with universal plug for fast connection\u003c\/li\u003e\n  \u003cli\u003e3.5 m (≈11.48 ft) main cable to reach most battery positions\u003c\/li\u003e\n  \u003cli\u003eIncluded switch mounts inside the cabin without cutting factory circuits\u003c\/li\u003e\n  \u003cli\u003eBlade fuse and 40A relay protect lights and wiring\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat light setups and power limits are supported?\u003c\/h3\u003e\n\u003cp\u003eThis harness is designed to operate two LED lamps together and supports combined loads up to 300W on a 12V system (about 25A for each lamp when evenly split). For single-lamp operation keep each fixture under 150W. If your vehicle uses 24V electricals, swap to a matching 24V relay before use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for 12V systems; relay replacement required for 24V vehicles\u003c\/li\u003e\n  \u003cli\u003eMaximum recommended combined wattage: 300W (12V)\u003c\/li\u003e\n  \u003cli\u003eSafe single-lamp limit: ≤150W\u003c\/li\u003e\n  \u003cli\u003eRelay rating: 40A blade type with protective fuse included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and safe is the wiring harness?\u003c\/h3\u003e\n\u003cp\u003eMaterials focus on corrosion resistance and heat tolerance: copper conductors inside PVC sheathing and a molded connector help keep moisture and abrasion out. The relay and fuse arrangement isolates high current from the cabin switch, reducing heat buildup at the dash and protecting the vehicle's factory wiring. Rated components and correct wire gauges ensure reliable long-term operation when installed per instructions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMain conductor: 14AWG (2 mm² equivalent) for high-current feed\u003c\/li\u003e\n  \u003cli\u003eAccessory wires: 16AWG for switch and control circuits\u003c\/li\u003e\n  \u003cli\u003eHighest working temperature rated to 85°C for typical automotive environments\u003c\/li\u003e\n  \u003cli\u003eIncludes safety blade fuse and instruction manual for proper wiring\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Installers, DIYers and vehicle owners fitting aftermarket LED bars, fog lights or work lamps who want a compact, safe wiring solution without modifying factory harnesses. It suits cars, trucks, ATVs and off-road builds that run 12V electrical systems and need a tidy, relay-protected feed with a cabin-mounted switch. If you operate at 24V, plan to replace the relay with a 24V-rated unit and follow the included wiring guidance for safe performance.\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: Can this harness run two 12V LED light bars?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It supports two 12V lights with combined load up to 300W; keep each lamp under 150W for single-lamp use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need a different relay for a 24V vehicle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Replace the default 12V relay with a 24V-rated relay before using on 24V systems.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"STDYSUN","offers":[{"title":"Default Title","offer_id":48085902950558,"sku":"B09S8FWLJZ","price":43.94,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/stdysun-harness-front-view.jpg?v=1785880168","url":"https:\/\/northtrailauto.ca\/products\/stdysun-12v-led-work-light-wiring-harness-kit-3-5m-14awg-40a-relay-switch-for-dual-light-bars","provider":"North Trail Auto","version":"1.0","type":"link"}