- Multi-Functional Automotive Circuit Tester: This essential diagnostic tool for automotive electrical systems delivers 12V or 24V DC power from the vehicle battery. Easily activate components, conduct voltage and diode testing, check continuity and ground, locate short circuits, and test polarity (positive and negative). - Convenient Lighting Design: Featuring a built-in light, this circuit probe allows for night-time maintenance and testing. Simply connect the red and black clips to the vehicle battery's positive and negative terminals for visibility and functionality in low-light conditions or use it as a portable work light. - Clear LED Indicators: The circuit tester includes LED indicators for quick identification of polarity. The red LED indicates positive polarity or activation, while the green LED signals negative polarity or reverse activation. Durable metal probes ensure corrosion resistance and optimal electrical conductivity. - Clear LCD Display: The device is equipped with a high-definition blue LCD display that clearly shows voltage readings from 3.5V to 36V. With 14.7 feet of long leads, you can comfortably access and test various electrical system components across your vehicle. It also includes overload protection and buzzer alerts for user safety. - Practical Applications: 1. Use the tester to troubleshoot electrical issues in your car, ensuring timely and effective repairs. 2. Check battery polarity before installing new components to prevent accidental damage. 3. Conveniently monitor the voltage levels of your vehicle's electrical system during routine maintenance or emergency situations. This automotive circuit tester combines robust functionality with user-friendly features, making it a must-have tool for any vehicle owner or automotive technician.