{"product_id":"szdystar-led-driving-light-bar-wiring-harness-kit-400w-12awg-dc12v-remote-switch-40a-relay","title":"Szdystar LED Driving Light Bar Wiring Harness Kit 400W 12AWG DC12V — Remote Switch \u0026 40A Relay","description":"\u003cp\u003e\u003cstrong\u003eThe Szdystar 400W LED Driving Light Bar Remote Control Wiring Harness Kit is a pre-assembled, heavy-duty DC12V power and control solution designed to safely run a single LED light bar (or multiple lights wired in parallel) up to 400W with remote switching and inline protection.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis wiring harness delivers a straightforward way to add or replace auxiliary lighting on trucks, SUVs, ATVs, and utility vehicles. It uses thick 12 AWG copper conductors and a sealed universal plug so you can connect most standard LED off-road light bars without splicing factory wiring. The kit includes a mountable adhesive remote switch, a 40A automotive relay, a blade fuse, and roughly 11.5 feet (3.5 meters) of cable for flexible routing through engine bays and behind bumpers.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this harness keep my lighting installation safe?\u003c\/h3\u003e\n\u003cp\u003eThe harness incorporates electrical safeguards designed for robust field use without complex wiring. A 40A relay prevents heavy current from passing through the dashboard switch, and a blade fuse protects the circuit against overloads. PVC insulation and corrosion-resistant terminals help the system survive harsh conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e40A automotive relay to handle high current loads safely\u003c\/li\u003e\n  \u003cli\u003eBlade fuse for immediate overload protection\u003c\/li\u003e\n  \u003cli\u003ePure copper conductors and PVC insulation for low voltage drop and durability\u003c\/li\u003e\n  \u003cli\u003eCorrosion-resistant terminals and waterproof plug for reliable outdoor use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat vehicles and light bars will this kit work with?\u003c\/h3\u003e\n\u003cp\u003eDesigned primarily for DC12V systems, the harness supports most single-row and dual-row LED driving light bars up to 400W. It also accepts halogen and HID fixtures when those lights operate on 12 volts. Vehicles on DC24V systems can use the harness if you swap the included relay for a DC24V relay.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with DC12V LED light bars, fogs, work lights, and pods\u003c\/li\u003e\n  \u003cli\u003eSupports up to 400W total—best for single light bars or parallel-wired setups under that limit\u003c\/li\u003e\n  \u003cli\u003eFor DC24V vehicles, replace relay with DC24V model (relay not included)\u003c\/li\u003e\n  \u003cli\u003eUniversal waterproof plug fits most aftermarket light bars\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is installation and remote operation?\u003c\/h3\u003e\n\u003cp\u003eThe harness comes mostly pre-assembled for a plug-and-play experience where feasible; still, we recommend professional installation if you are not comfortable with vehicle electrical systems. The compact remote control switch mounts with adhesive on any flat surface and offers a reliable wireless range up to 100 feet (30 meters) for convenient operation from outside the vehicle.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePre-assembled wiring reduces installation time and wire splicing\u003c\/li\u003e\n  \u003cli\u003eMountable adhesive remote switch with robust plastic housing\u003c\/li\u003e\n  \u003cli\u003eUp to 100 ft (30 m) remote range for off-vehicle control\u003c\/li\u003e\n  \u003cli\u003e11.5 ft (3.5 m) harness length for flexible routing through engine bay\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat material and performance specs should I expect long-term?\u003c\/h3\u003e\n\u003cp\u003eThis harness uses heavy-duty 12 AWG copper core wiring to minimize voltage drop and maximize current capacity for high-output lights. Components are selected for durability: PVC and silicon-infused wire insulation, corrosion-resistant metal terminals, and a temperature rating up to 185°F (85°C) for demanding operating conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e12 AWG copper core wire for efficient power delivery\u003c\/li\u003e\n  \u003cli\u003eRated for continuous operation up to 185°F (85°C)\u003c\/li\u003e\n  \u003cli\u003eDurable PVC insulation and sealed connectors for weather resistance\u003c\/li\u003e\n  \u003cli\u003eIncluded blade fuse and relay for long-term circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Car, truck, ATV, and off-road owners who want a reliable, pre-built wiring solution to power aftermarket LED driving light bars without extensive wiring modifications. This kit is suited to DIYers with basic electrical skills and to professional installers seeking a quality, ready-made harness for 12V auxiliary lighting projects. If your vehicle uses a 24V system, plan to source a compatible 24V relay before installation. Always confirm local laws on auxiliary lighting use and consider professional installation for best results.\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 a 300W LED light bar?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit supports up to 400W on DC12V, so a 300W light bar is within the rated capacity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this work on a 24V vehicle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Only if you replace the included relay with a DC24V-compatible relay; other wiring remains the same.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Szdystar","offers":[{"title":"Default Title","offer_id":55167268880727,"sku":"B0GKVNNGQ1","price":42.89,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/szdystar-front-harness-assembled.jpg?v=1790380794","url":"https:\/\/britishgarage.co.uk\/products\/szdystar-led-driving-light-bar-wiring-harness-kit-400w-12awg-dc12v-remote-switch-40a-relay","provider":"British Garage","version":"1.0","type":"link"}