VERSATILE USE: The automotive voltage tester is suitable for diagnosing all electrical systems in vehicles with 6 to 24 V DC. It can check switches, relays, and the on/off status of diodes, fuses, and circuits, helping reduce diagnosis time in vehicle electrical systems. POLARITY AND CONTINUITY TESTING: With this power circuit probe, you can quickly determine the positive and negative polarity of electrical cables and connectors in vehicles. It can also test continuity and perform a bypass using the additional ground cable. TRACKING & LOCATING SHORT CIRCUITS: The power tester uses advanced, highly sensitive probes for fast and accurate detection. With the continuity tester, you can save time troubleshooting vehicle wiring and quickly locate the faulty wire and its fault point. COMPONENT ACTIVATION AND TESTING: This car test lamp can activate and test components in and out of the vehicle's electrical system to check whether the components are defective or if the component's rated current exceeds that of the circuit tester. HUMANIZED DESIGN: The cable length of the auto tester is approximately 13.5 ft, allowing easy access to and testing of any electrical system. The LED display and buzzer warning help identify problems at a glance. Its clips with strong grip force are less likely to fall off, providing a better user experience. Product details: Color: Red/Blue Operating voltage: 6-24V DC Cable length: 13.5 ft Overload protection: 8A (automatically cuts off power if current exceeds 8A) Package dimensions: 27.6 x 9 x 4 cm Package weight: 320 g Packing list: 1 x Circuit tester 2 x Manual Versatile application: The car power tester is suitable for vehicles with 6-24V DC to test switches, relays, diodes, fuses, and circuits. Polarity and continuity test: The tester quickly shows the polarity and checks the continuity of cables and plugs. Includes ground cable for bridging. Short circuit tracking: With highly sensitive probes, the power tester helps quickly find short circuits and locate faults in vehicle wiring. Component testing: Activates and tests components in the vehicle to determine whether they are defective or if the rated current is correct. Humanized design: The 13.5 ft long tester allows easy access to systems, with LED display, buzzer warning, and strong clips for better grip.