7-Way Round to 4-Way Flat Pin Adapter w/LED Testing Light and Secure Tab For Trailer Tow Hitch & Redline Tailgate LED

OPT7 7-Pin to 4-Pin Trailer Adapter with LED Tester – Secure Fit, Weatherproof Plug
Convert your vehicle’s 7-way blade connection to a 4-way flat trailer plug while testing your trailer’s lighting circuits. This 2-in-1 adapter is ideal for trucks, campers, and towing setups needing quick diagnostics and a tight, secure fit.

2-in-1 Adapter + LED Tester
Instantly check connection status with built-in LED indicators—know when your trailer lights or OPT7 products are properly connected and functioning.

Secure, Weatherproof Design
Includes a 7-pin dust cover and sealed construction with rust-resistant brass prongs and cap, keeping your plug protected in all weather conditions.

Resilient Retainer Fins for Tight Fit
No more loose connections. This adapter’s finned design ensures a snug fit with any OEM 7-pin plug. Say goodbye to flickering tail lights.

Built for Any Rig
Designed to handle trailers, campers, and towing accessories without failure—even on rough roads and long hauls.

Warranty Covered:
Includes our free 30 Days Warranty (starting from the order date)

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov