VERSATILE: This automotive voltage tester is suitable for diagnosing electrical systems in vehicles with 6 to 24 V DC. It can check switches, relays, diodes, fuses, and circuits, helping reduce diagnostic time in vehicle electrical systems. POLARITY AND CONTINUITY TESTING: This power circuit probe allows quick identification of positive and negative polarity in automotive electrical wires and connectors. It also supports continuity testing and includes an additional ground cable for bypass functionality. TRACKING & LOCATING SHORT CIRCUITS: Equipped with high-sensitivity probes, this current tester delivers fast and accurate detection. The continuity function helps save time when troubleshooting vehicle wiring, enabling quick location of faulty wires and fault points. COMPONENT ACTIVATION AND TESTING: This test lamp can activate components within or outside the vehicle's electrical system to verify functionality, especially useful when component current exceeds the rating of standard circuit testers. HUMANIZED DESIGN: The tester features a 13.5 ft cable, allowing easy access to various electrical points. LED indicators and buzzer alerts provide clear problem identification. The clips have strong grip force to prevent disconnection during use. Product details: Color: Red/Blue; Operating Voltage: 6–24V DC; Cable Length: 13.5 ft; Overload Protection: 8A (automatically cuts off power when current exceeds 8A); Package Dimensions: 27.6 x 9 x 4 cm; Weight: 320g Package Contents: 1 x Circuit Tester, 2 x Manual