Oyviny 4-Way Flat Trailer Wiring Tester

The Oyviny 4-Way Flat Trailer Wiring Tester is designed to confirm the proper function of your vehicle’s trailer wiring harness. This tester is excellent for diagnosing trailer light issues, allowing you to identify where in the system there is a problem without guessing. It features a plug-and-play design, making it easy to use; simply plug the tester into the 4-pin flat trailer connector on your tow vehicle and trailer to test taillights and turn signals for proper operation. The tester includes bright LED indicators for each electrical function, enabling you to easily read the LEDs and determine which wiring has a problem. Constructed from durable ABS plastic, this tester will never rust or corrode, and it features tin-plated copper terminals for great conductivity. The female end tester comes with a rubber dust cover to protect the terminals when not in use. Its compact design allows for convenient storage in your toolbox or glove compartment, making it readily available whenever needed. • 4 Way Trailer Tester for diagnosing trailer light issues • Plug & Play design for easy use with 4 pin connectors • Bright LED indicators for each electrical function • Durable ABS plastic construction with tin-plated copper terminals • Compact design for convenient storage in toolboxes or glove compartments