VASTAUTO 7-pin Trailer Wiring Harness Extension 7ft — Plug-and-Play Chassis-Mount OEM Socket

The VASTAUTO 56070 is a 7-foot, 7-pin trailer wiring harness extension that adds a second OEM-style 7-way socket to your truck for towing lights, brakes, and auxiliary power.

This heavy‑duty extension harness preserves your vehicle's original RV blade socket while extending reach and functionality to a convenient chassis‑mounted 7‑way connector. Built from automotive‑grade materials and tested to meet or exceed OEM standards, the VASTAUTO 56070 installs without cutting or splicing and includes a 12‑month warranty and hassle‑free return policy for added confidence.

How does this harness maintain factory wiring integrity?

The extension plugs directly into your vehicle's existing 7‑pin tow line, so there is no need to cut, splice, or otherwise alter the factory harness. This preserves original connectors and simplifies removal if you return to a factory configuration.

• Direct plug‑in installation—no wire modification required.
• Retains original RV blade socket while adding a chassis mount.
• Corrosion‑resistant connectors designed for vehicle environments.

Which vehicles is the VASTAUTO 56070 compatible with?

The harness is designed for many Chevy, Dodge, Ford, GMC, Nissan, Ram, and Toyota models. Compatibility depends on your vehicle’s tow connector and listed interchange part numbers, so verify fitment before purchasing.

• Replace numbers include 56070, 57008, and 56000 for cross‑reference.
• Confirm your truck’s connector type and model year prior to order.
• Ideal for trucks that need an additional 7‑way chassis socket.

What functions does the extension support when towing?

The VASTAUTO extension carries all standard trailer signals and auxiliary power, enabling full operation of lights, turn signals, brake lights, reverse lights, electric brakes, and a power feed for accessories. It delivers the same signal set as the original 7‑pin socket.

• Tail, brake, turn, and backup light circuits included.
• Electric brake circuit and battery/auxiliary power line provided.
• Designed to handle typical towing electrical loads safely.

How easy is installation and what tools are needed?

Installation is straightforward: plug the harness into the vehicle tow line and mount the new 7‑way socket to the chassis. No cutting or splicing means most users can complete the job quickly; a 2‑1/8" hole saw is typically required to create the mounting opening.

• Plug‑and‑play—no electrical expertise required for basic install.
• Mounting requires a 2‑1/8" hole saw and basic hand tools.
• Full instructions included with the harness for step‑by‑step setup.

Who is this for: The VASTAUTO 56070 harness is for truck owners who tow trailers frequently and want a durable, OEM‑style 7‑way extension without modifying factory wiring. It’s well suited to pickup owners who need a second, chassis‑mounted 7‑pin socket for easy trailer hookup, RV owners who preserve original connectors, and fleet managers who require reliable, serviceable towing connections backed by a 12‑month warranty.