1. EVERYTHING YOU NEED IN TRAILER LIGHT & BRAKE TESTERS

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        If you need commercial Trailer Light Testers, Trailer Brake Testers, Mobile Diagnostic Testing Equipment that is sturdy, straightforward and functional and pays for itself in improved operating efficiency youve come to the right place.

        For more than 20 years, Square Wheel Industries has supplied Trailer Testers and Express Garage trailer testing equipment to assist in troubleshooting trailer light and brake systems to the trucking and RV industries. Our trailer testing equipment can be found in any size operation, from the assembly plants of some of our nation’s largest trailer manufacturers to a person running a mobile service truck out of his home.

        Not familiar with our trailer light or brake testers? Be sure to check our FAQs, where we answer frequently asked questions; or click Documents, to go directly to our document library.

        Our secure, online store is open 24/7. You can also order by phone during normal business hours at (610) 921-8561.

        Find out what Trailer Testers can do
        for you and your business

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