Nilight 4‑Pin Fused Relay Kit 5-Pack SPST 30A with Socket and 14AWG Harnesses

Nilight 5 Pack Fused 4‑Pin Relay with Socket is a ready-to-install SPST 30A relay kit that combines relays, pre-wired sockets and integrated fuse holders for safe, compact high-current switching.

This kit groups five 4‑pin single-pole single-throw relays with matching harnesses and 30A blade fuses to simplify adding or upgrading switched circuits on vehicles and equipment. Each socket includes a built‑in fuse holder and heavy 14AWG main conductors, so you get protected high-current switching without needing separate fuse blocks. The plug‑and‑play wiring and interlocking socket design reduce installation time and keep wiring tidy in tight spaces.

How do these relays make wiring automotive accessories easier?

Pre-labeled, color-coded wires on every socket let you identify ground, power, trigger and switched output at a glance, cutting guesswork during installation. The harnesses use thicker 14AWG conductors for the main current path, so you can run lights, motors or locks with greater confidence.

• Color-coded leads: Black = ground (85), Red = battery power (30), White = trigger (86), Blue = normally open output (87)
• 14AWG heavy-duty wires for main contact to handle high current
• Plug-in sockets for quick swap or service without rewiring

What safety features protect the circuits?

Each relay socket includes an onboard blade-fuse slot populated with a 30A fuse, so the switched circuit is protected right at the relay. That removes the need for a separate inline fuse holder and positions overcurrent protection close to the power source.

• Built-in 30A blade fuse per socket for immediate overcurrent protection
• Heat-resistant socket materials designed for automotive environments
• Interlocking mounting keeps relays secured and prevents loose connections

Can I mount multiple relays together and manage cable routing?

The sockets feature a male/female interlock along each edge so you can snap multiple relay sockets together into a single bank. This modular mounting streamlines cable runs and leaves a cleaner installation footprint in engine bays or control boxes.

• Interlocking edges let you join sockets in rows for compact grouping
• Neat cable routing reduces stress on terminals and simplifies troubleshooting
• Individual relays remain serviceable without disturbing neighbors

Who is this for: This Nilight kit is aimed at DIY mechanics, electricians and installers who need reliable, compact switching for automotive and recreational applications—such as driving lights, winches, power locks, trunk releases, aftermarket ignition/accessory feeds, or any low-voltage device that must be switched by a small control signal. It’s also useful for fleet or shop technicians who prefer pre-wired, fused relay solutions that reduce installation time and improve serviceability.