Nilight 10016W DT Wiring Harness Kit for LED Light Bars — 12V, Dual DT Leads, On/Off Switch

The Nilight 10016W DT Wiring Harness Kit is a ready-made 12V power and control loom that provides a safe on/off switch, relay protection, blade fuse and two DT output leads for easy connection to LED light bars.

This wiring harness bundles the electrical components you need to power and control LED light bars without splicing: a sealed DT plug for direct mating with compatible lights, an inline blade fuse and relay for circuit protection, and a convenient dashboard-style on/off switch. The kit is long enough for flexible routing, supports dual light outputs, and is built for automotive and marine 12V systems where a reliable, plug-and-play solution speeds installation and reduces electrical mistakes.

How do I install this harness on my vehicle?

Installation is straightforward: route the harness from the battery to the light bar, secure the relay and switch, and plug the DT connector into the light. The kit includes an instruction sheet and uses common terminals so basic mechanic skills and simple hand tools are sufficient.

• Connect fused positive lead to battery terminal or distribution post.
• Ground the negative lead securely to chassis metal.
• Mount relay and switch where accessible and protected from moisture.
• Plug DT connector directly into compatible LED light bar—no cutting required.

What electrical protection does the harness provide?

The harness integrates a blade-style inline fuse and a power relay to keep the circuit protected from overcurrent or accidental shorts. The relay reduces current through the switch, extending switch life and improving overall safety.

• Inline blade fuse limits current to prevent wiring damage.
• Power relay isolates the switch from main load current.
• Quality connectors and sealed DT plug help resist moisture and corrosion.

Can I run two LED lights from this harness, and what load can it handle?

Yes — the kit supplies two output leads so you can connect dual lighting fixtures. It’s designed for combined loads under the harness rating (check light wattages); using two fixtures that together stay within the relay and fuse limits keeps the connection stable and safe.

• Two DT output leads for dual fixtures, simplifying wiring for multi-bar setups.
• Intended for 12V systems; confirm combined wattage is below the relay/fuse rating.
• Provides cleaner wiring and more reliable connections versus ad-hoc splicing.

How long is the harness and is it suitable for boats or off-road vehicles?

The package includes a 12-foot (approx.) harness that gives ample length for routing across most vehicles and marine craft. The sealed DT connector and inline protection make it suitable for exposed and mobile installations when mounted and routed properly.

• 12-foot overall length for flexible routing and neat installation.
• Sealed connector and quality terminals suitable for damp environments.
• Ideal for SUVs, trucks, ATVs, UTVs, boats and other 12V applications.

Who is this for: Installers, DIY vehicle owners, and marine hobbyists who want a plug-and-play electrical harness to power one or two LED light bars with built-in circuit protection and a convenient on/off switch. If you need a neat, reliable wiring solution that eliminates guesswork and reduces time spent splicing or sourcing separate relays and fuses, this kit is designed to simplify the job.