Trailer Electrical Testing

TEDS Trailer Light Tester and Electrical Diagnostic Solutions

Trailer electrical problems waste time and money. Dunarri TEDS trailer testers simplify diagnosing lights, brakes, and wiring issues in seconds. Whether you need a quick trailer light tester for routine checks or a professional-grade trailer electrical test box for in-depth diagnostics, TEDS has you covered.

Dunarri TEDS is a rugged, waterproof trailer electrical system tester built for everyday use. Test all trailer lighting and brake circuits easily using its rotary switch. It features built-in protections against reverse polarity and back-feed, with a 7-way socket plus adapters for 4-pin and 6-pin connectors. Compatible with Milwaukee and DeWalt 20V batteries, it’s an essential trailer light and brake tester for any owner, mechanic, or mobile technician.

Dunarri TEDS Pro takes your trailer testing to the next level. It includes a digital amp/volt gauge for real-time readings, a powerful 20A load capacity, and an Auto-Test mode for one-person diagnostics. Built for professionals and fleets, it features a Hopkins Endurance connector, advanced circuit protection, and compatibility with Milwaukee and DeWalt battery systems, making it the most powerful trailer electrical tester available.

Both models are built in the USA, come with flexible battery options, and include a 24-month warranty. Choose your TEDS tester today to keep your trailers safe and operational.

TEDS PRO Overview	Using TEDS Pro - Full Walkthrough
TEDS Basic Functions	TEDS - Operation and Use
Dunarri TEDS - EXTREME Drop test