- Illuminated Testing: The cable tester features a built-in light to illuminate dark testing areas. Easily identify polarity with a large alligator clip that connects to either the negative or positive ground. A green light indicates positive polarity, while a red light shows negative polarity. - Durable and Practical Design: Constructed with a sharp, hardened steel probe for easy wire piercing, this tester is ideal for inspecting electrical circuits. Its long probe and oversized alligator clip allow access to hard-to-reach areas, making it user-friendly. - Versatile Functionality: This tool is capable of detecting fuses, identifying positive and negative power supplies, checking battery levels, and testing LAN circuits. It can also differentiate between real and virtual current, diagnose poor grounding, read fault codes, and find errors related to Hall sensors and short circuits. - Wide Compatibility: Specifically designed for automotive applications, this circuit test pin tester works seamlessly with cars, trucks, boats, RVs, trailers, motorcycles, and other low voltage systems operating between 6-24V. - Practical Applications: Ideal for mechanics performing diagnostic tests on vehicles, electricians troubleshooting circuits, and DIY enthusiasts checking battery power and wiring in various equipment. With its robust features and reliable performance, this cable tester is an essential tool for anyone dealing with electrical systems.