Szdystar LED Driving Light Bar Wiring Harness Kit 400W DC12V with Remote Switch & 12AWG Cable

Szdystar's 400W remote wiring harness kit gives you a pre-wired, heavy-duty DC12V power solution to run one or multiple LED driving light bars safely and conveniently.

This complete wiring harness is designed for reliable auxiliary lighting installation without cutting factory circuits. It pairs a thick 12 AWG copper cable with a 40A relay, blade fuse, waterproof plug and a compact adhesive-backed remote switch so you can power and control LED driving lights up to 400 watts from inside or near your vehicle. Built for off-road use and daily drivers alike, the kit strikes a balance between durable materials and straightforward installation for mechanics and experienced DIYers.

How does this harness handle high-wattage LED light bars?

The kit is rated to supply up to 400W at DC12V, which covers most single-row and many dual-row LED bars. Heavy 12 AWG conductors keep voltage drop low so lights run efficiently, and a 40A relay plus blade fuse protect wiring and components from overloads.

• 400W maximum power handling (DC12V)
• 12 AWG copper core wire for reduced voltage drop
• 40A automotive relay and blade fuse for circuit protection
• Supports single light bar or parallel-wired multiple lights within wattage limits

What remote and control features come with the kit?

The included remote offers convenient on/off operation and multiple modes from up to 30 meters (about 100 feet) away. The compact switch has adhesive backing for easy mounting on a dash or roll cage, letting you place controls where they’re most handy during driving or work tasks.

• Extended remote range up to 30 meters (100 ft)
• Mountable adhesive-backed manual switch housing
• Simple on/off operation, fits in small interior spaces
• Pre-assembled leads minimize wiring time

Is this harness durable and weather-resistant enough for off-road use?

Yes—the wiring uses PVC insulation and pure copper conductors with corrosion-resistant terminals for reliable performance in harsh conditions. A universal waterproof plug secures the connection to most LED bars, and components are rated to handle elevated temperatures typical of engine bays and exterior mounts.

• PVC-insulated cable with corrosion-resistant terminals
• Universal waterproof plug to protect the lamp connection
• Temperature rating up to 85°C (185°F)
• Quality construction for repeated on/off cycles and rough use

Can I use this harness on DC24V systems or multiple lights?

The harness is set up for DC12V vehicles by default. If your vehicle runs DC24V, swap the supplied relay for a DC24V-compatible relay before installation. You can also wire multiple lights in parallel provided the combined wattage does not exceed 400W.

• Default configuration: DC12V — swap relay for DC24V systems
• Parallel wiring supported when total load ≤ 400W
• Harness length ~11.5 ft (3.5 m) for flexible routing
• Check local laws before using auxiliary lights on public roads

Who is this for? The Szdystar 400W remote control wiring harness is ideal for vehicle owners upgrading to aftermarket LED driving bars—off-road enthusiasts, tradespeople needing extra work lights, and mechanics seeking a ready-to-install power solution. It’s also appropriate for knowledgeable DIYers who understand vehicle electrical systems or professionals who prefer a pre-assembled, heavy-gauge harness to speed up installations. Remember to verify vehicle voltage and local lighting regulations before fitting.