The Car Electric Circuit Tester Probe is the ultimate tool for reducing diagnostic time in automotive electrical systems. With its long cable, testing becomes easy and convenient. Simply hook up the unit to the vehicle's battery and you can conduct a positive or negative battery current to the tip by rocking the power switch forward or backward. The unit is equipped with short-circuit protection and can instantly test for bad ground contacts. It also allows you to track and locate short circuits, making troubleshooting a breeze. Additionally, the unit can test for continuity and polarity of a voltage, check switches, relays, diodes, fuses, circuits, electric cables, and plugs. The Car Electric Circuit Tester Probe is a comprehensive 6-24V DC test kit that is perfect for automotive technicians. Its auxiliary ground lead assists in testing for continuity, while the unit's easy-to-follow operation instructions ensure hassle-free use. To use the tester, simply unroll the unit's cable and clamp the red clip to the positive terminal of the vehicle's battery, and the black clip to the negative terminal. However, it is important to note that the tester should not be used around explosive gas, vapor, or dust. Safety precautions should always be followed to prevent accidents and ensure proper functionality of the unit. Key Features: Reduces diagnostic time in automotive electrical systems Long cable for easy testing Can conduct positive or negative battery current Short-circuit protection and instant testing for bad ground contacts Allows tracking and locating of short circuits Tests for continuity and polarity of voltage Checks switches, relays, diodes, fuses, circuits, electric cables, and plugs Comprehensive 6-24V DC test kit