Szdystar LED Light Bar Wiring Harness Kit DC12V 14AWG 40A Relay with Remote On/Off Switch, 3.5m Cable

Szdystar LED Lights Bar remote control wiring harness kit is a ready-to-install 1-lead 14AWG DC12V wiring loom with a 40A relay, blade fuse and wireless On/Off switch for single LED driving lights up to 300W.

This plug-and-play wiring harness connects a single LED driving light or light bar to your vehicle battery while offering remote on/off control, an in-line 40A blade fuse and a durable 14AWG cable. The kit is assembled for DC12V systems (relay change required for 24V), includes roughly 3.5 meters of cable to reach common mounting points, and is built from quality copper conductors and PVC insulation for weather resistance and longer life.

How will this harness simplify my LED light installation?

The Szdystar kit routes power directly from the battery to your LED light, preventing extra load on factory wiring and switches. A keyed remote switch and prewired relay mean fewer splices and a cleaner install compared with building a loom yourself. It’s suitable for single-lamp setups and includes a replaceable blade fuse for overcurrent protection.

• Direct battery feed prevents stress on OEM circuits
• Prewired 40A relay handles up to recommended load safely
• 3.5 m (≈11.48 ft) length gives flexible routing options
• Plug-and-play connectors reduce installation time

What loads and voltages does the harness support?

The harness is designed for DC12V systems and supports a single LED light with a practical cap near 300W. If your vehicle uses a 24V system you must swap the included relay with a 24V-rated unit to maintain reliability. The 14AWG (approx 2 mm²) cable and 40A fuse are matched to typical off-road and auxiliary lamp currents under recommended operating conditions.

• Standard configuration: DC12V, single light up to 300W
• Relay rating: 40A blade-style (change for DC24V use)
• Wire gauge: 14AWG (approx. 2 mm²) for stable current flow
• Fuse: included safety blade fuse for circuit protection

How does the wireless switch and remote work on this kit?

The kit includes a wireless remote and a keyboard-style on/off switch that can be mounted inside the cabin. Remote range is approximately 30 meters under typical conditions, giving convenient control when on or off the vehicle. The on/off switch is simple to operate and can be fixed in any accessible location using its backing adhesive.

• Remote control distance: roughly 30 meters
• Switch type: keyboard plastic switch with adhesive backing
• Switch operation: straightforward On-Off functionality
• Multiple modes not required for single-lamp On/Off use

What durability and safety features are included?

The harness is constructed from copper conductors and high-quality PVC insulation to resist environmental exposure and frequent use. A 40A relay and inline blade fuse add electrical protection, and components are rated for typical operating temperatures up to 85°C. While built for durability, professional installation is recommended to ensure secure grounding, correct relay selection, and compliance with local regulations.

• Materials: copper, PVC, metal relay components for strength
• Temperature rating: parts rated up to 85°C
• Safety: includes blade fuse and relay to reduce overload risk
• Installation: professional installation advised for best results

Who is this for? The Szdystar LED Lights Bar wiring harness kit is intended for DIYers, mechanics and off-road enthusiasts who need a dependable, single-lamp power solution for DC12V setups. It’s ideal when you want a neat, battery-fed connection with remote on/off control for LED driving lights, spot lights, fogs or work lights, and when you prefer a preassembled loom to speed installation. If your vehicle uses 24V, plan to source a matching 24V relay before fitting; always follow local vehicle lighting laws and, where possible, have an experienced technician complete the wiring.