ONLINE LED STORE 3ft 7-Pin Trailer Extension Cable for Fifth-Wheel/Gooseneck — Waterproof, Nickel-Plated

This 3-foot, 7-pin extension from ONLINE LED STORE is designed to bridge the gap between your truck's bed-mounted fifth wheel or gooseneck hitch and your trailer's factory wiring without rewiring either vehicle. Made for professional and recreational use, the cable combines commercial-grade materials with secure terminals and user-friendly features so you can tow confidently on highways and rough roads.

How does this extension keep trailer lights and brakes working reliably?

The TRUE MODS extension uses heavy-duty, nickel-plated copper double-prong terminals that deliver a stable electrical connection and reduce intermittent contacts that cause flicker or failure. Its commercial-grade PVC jacket protects conductors from moisture and road debris to maintain consistent performance.

• Double-prong, nickel-plated copper terminals for secure conductivity
• Waterproof PVC sheathing resists corrosion and abrasion
• Spring-loaded socket cap keeps a firm grip on the trailer plug
• Designed to prevent loose connections on bumpy roads

Will this work without rewiring my trailer or truck?

Yes — this cable is plug-and-play, allowing you to install the extension in your truck bed and connect to your existing bumper or hitch harness without altering factory wiring. When you need to tow a different trailer, simply unplug the extension for full compatibility.

• 3-foot length for convenient reach between hitch types
• Fits standard 7-pin trailer sockets and plugs
• Unplug to return to lightweight trailer towing — no permanent changes
• Finger lugs on the plug end make removal fast and tool-free

How durable is the cable in harsh weather and heavy-use conditions?

The TRUE MODS extension is built for long service life in towing conditions, featuring commercial-grade PVC sheathing that blocks water and resists wear. Corrosion-resistant terminals and a secure socket cap reduce failure risk from environmental exposure and vibration.

• Waterproof, corrosion-resistant PVC outer jacket
• Nickel-plated terminals to fight oxidation
• Spring-loaded cap prevents moisture intrusion at the socket
• Constructed for repeated plug/unplug cycles and road vibration

How easy is it to install and remove when swapping trailers?

Installation is straightforward: plug the extension into your truck’s harness and attach the trailer plug into the spring-loaded socket. The plug end includes finger lugs for quick removal, so swapping trailers or stowing the cable takes seconds.

• Plug-and-play design — no special tools or wiring knowledge required
• Finger lugs for quick, hand-operated unplugging
• Compact 3-foot length minimizes slack while providing reach
• Spring-loaded socket ensures a snug fit under movement

Who is this for: The TRUE MODS 3ft 7-Pin Extension Cable is ideal for truck owners who tow fifth-wheel or gooseneck trailers and need a short, rugged extension to bridge wiring gaps without modifying factory wiring. It also suits fleets, contractors, and occasional haulers looking for a durable, easy-to-use solution that resists corrosion and stays connected on rough roads.