- Multi-Functional Automotive Circuit Tester: This essential diagnostic tool supports both 12V and 24V DC power from your vehicle battery, enabling you to activate components, test voltage, check diodes, verify continuity, test grounds, and locate shorts. It also performs positive and negative polarity tests, making it a versatile addition to your automotive toolkit. - Convenient Lighting Design: The circuit probe features built-in illumination, allowing for easy connections to battery terminals even in low light. Attach the red and black clips to the positive and negative terminals, respectively, and use the probe as a working light for nighttime maintenance and testing. - LED Polarity Indicator: Equipped with clear LED indicators, this tool simplifies polarity identification. The red LED signals positive polarity, while the green LED indicates negative polarity. High-quality metal probes ensure corrosion resistance and optimal electrical conductivity for reliable performance. - Clear LCD Display: The blue LCD shows voltage readings in high definition, easily displaying values from 3.5V to 36V. With 14.7 feet of lead length, you can comfortably test various electrical components throughout your vehicle. The tester includes overload protection and a buzzer alert for enhanced safety during use. Use Scenarios: 1. Quickly diagnose battery issues by testing voltage levels and identifying polarity to ensure proper connections. 2. Locate and troubleshoot short circuits in your vehicle's wiring, saving time and preventing further electrical problems. 3. Conduct routine maintenance checks on automotive components, ensuring they operate efficiently and safely.