Pollak 12-741 7-Way RV Blade Socket LED Circuit Tester – Instant Trailer Wiring Diagnostics

The Pollak 12-741 is the essential diagnostic tool for every truck owner and fleet mechanic. Designed to provide an instant health check of your vehicle’s towing electrical system, this tester plugs directly into any standard 7-way RV blade-style socket. Instead of crawling under the chassis with a multimeter, you can diagnose wiring issues from the driver’s seat or behind the bumper in seconds.

Bright LED Visual Feedback Featuring a high-visibility LED display, the 12-741 monitors all critical towing circuits simultaneously. The labeled lights correspond to specific functions, allowing you to verify that power is reaching the socket for:

• Tail / Running Lights

• Left Turn & Brake

• Right Turn & Brake

• Reverse / Backup Lights

• 12V Auxiliary Power

• Electric Trailer Brakes

Rugged and Portable Design Built with the same high-impact, weather-resistant nylon as Pollak’s heavy-duty connectors, this tester is designed to live in your glovebox or toolbox. Its compact, "plug-and-go" design makes it the perfect companion for pre-trip inspections, ensuring your trailer lights are fully operational before you hit the road.