Cotonlake 12V 40A 4-Pin SPST Relay Harness Sockets (2-Pack) – Waterproof, Color-Coded Wires For Car, Truck, Boat Wiring

Need to wire up some lights, a winch, or an accessory fan?

These relay sockets make the job way cleaner and more reliable.

This 2-pack includes heavy-duty 4-pin SPST (Single Pole Single Throw) relay sockets rated for 12 volts and up to 40 amps.

They're fully waterproof with a nylon shell that keeps out moisture, dust, and grime—great for under-hood use, marine applications, or off-road trucks.

The wires are color-labeled (usually red, black, yellow, etc.) so you know which is for power, ground, trigger, and load, making hookup a breeze even if you're not an electrical pro.

Inside, they use pure copper coils for solid conductivity and low heat buildup.

Each socket has a metal mounting tab so you can bolt it down securely.

They're direct replacements for common types like JD-1912.

Whether you're adding aftermarket lights to your Jeep, a stereo amp in your car, or a bilge pump in your boat, these sockets give you a plug-and-play connection that's safer than twisting wires together.

Keep your wiring organized, protected, and professional-looking with these rugged little guys.