Szdystar LED Light Bar Wiring Harness Kit 12V 4-Lead — 40A Relay, Wireless Switch & 3.5m Cable

The Szdystar LED Light Bar Remote Control Wiring Harness Kit is a complete 4-lead 12V wiring loom with remote on/off switch, 40A blade relay, inline fuse and 3.5 m cable designed for auxiliary driving and work lights.

This plug-and-play wiring harness bundles the key electrical components you need to add or control up to four LED driving lights safely from a distance. Built with 14AWG main cable, a 40A relay and a safety blade fuse, the kit supports up to 300W total load (max 75W per lamp) and includes a compact wireless on/off keyboard-style switch that can be mounted in the cabin. The harness is insulated with durable PVC, uses copper conductors, and comes with a universal plug for straightforward installation when paired with compatible lights.

What does the kit include and how is it wired?

The package includes the assembled wiring harness with four individual leads, a wireless on/off keyboard-style switch, and one safety blade fuse. The main power lead connects directly to the battery, the relay handles switching, and the four subordinate cores feed each light independently.

• Complete 4-lead wiring loom with universal plug and 3.5 m (approx 11.48 ft) cable
• 14AWG main cable (approx 2 mm²) and 16AWG subordinate cores
• 40A blade fuse and relay (replace relay for 24V systems)
• Wireless keyboard-style on/off switch with ~30 m remote range

How much load can this harness safely support?

The harness is rated to handle up to 300W total at DC12V, with a recommended maximum of 75W per individual lamp to avoid overloading a single lead. For DC24V installations, swap in a relay rated for 24V to maintain reliability and lifespan.

• Maximum combined power: 300W at DC12V
• Recommended per-lamp limit: under 75W
• Relay: 40A blade (replace for 24V systems)
• Fuse protection included to guard against overloads

How easy is installation and what safety steps should I follow?

This harness is assembled for straightforward connection: battery positive, battery negative (or chassis ground), relay/control wiring, and four light outputs. Professional installation is recommended if you are not comfortable with vehicle electrical systems; follow local regulations and confirm matching voltage and wire hardness before finalizing connections.

• Direct battery connection preserves original vehicle wiring
• Keyboard switch is adhesive-backed for flexible mounting inside cabin
• Use the supplied blade fuse and a properly rated relay for your system
• Consult a professional or wiring guide if unsure

What environments and lights is this harness suitable for?

The Szdystar harness is built for off-road, utility, and auxiliary lighting applications including LED driving bars, spot lights, fog lights and work lamps. Materials and construction prioritize durability, but ensure connectors and exposed areas are sealed appropriately for prolonged wet or corrosive conditions.

• Designed for DC12V LED driving bars, pod lights, fog and work lights
• Durable PVC insulation with copper conductors for reliable power delivery
• Keyboard switch and remote enable convenient on/off control up to ~30 m
• Switching components rated to 85°C maximum working temperature

Who is this for: The Szdystar wiring harness kit is aimed at vehicle owners, mechanics and off-road enthusiasts who need a safe, ready-made electrical solution to power and remotely control multiple auxiliary lights. It suits do-it-yourself installers who want a tidy harness with a wireless cabin switch, and professionals who prefer pre-assembled looms for quicker, code-compliant installs. Always verify your vehicle voltage and local rules before installation and replace the relay for 24V systems.