10' Custom Wiring Extension Harnesses

The 10' Custom Wiring Extension Harness adds a fully functional 7‑Way RV blade connector directly to your truck bed, giving you a cleaner, safer, and more convenient towing setup. Designed for fifth‑wheel and gooseneck trailers, this heavy‑duty extension plugs into your factory 7‑way at the bumper and routes a secure connection into the bed—no cutting or splicing required. The durable, weather‑sealed construction ensures reliable power delivery for brakes, lights, and auxiliary functions in all conditions.

Key Features

• 10‑foot length ideal for fifth‑wheel and gooseneck towing

• Adds an in‑bed 7‑Way RV blade while retaining the bumper connector

• Plug‑and‑play OEM‑style connectors—no wiring modifications

• Heavy‑duty, weather‑resistant cable and molded plug ends

• Reduces cable strain and improves trailer hookup safety