Test low-voltage vehicle circuits with this 3-pack of automotive circuit tester probes. Each tester features a built-in LED indicator, sharp steel piercing probe, crocodile clip and approx. 4.5ft lead, making it useful for basic checks on car fuses, lights, sockets and vehicle wiring. Connect the crocodile clip to a suitable vehicle ground point, such as the chassis, then use the probe to test the circuit. The LED indicator lights when the circuit is complete. Simple to use: Connect the crocodile clip to the ground (Chassis), then take the probe to test the circuit. The sharp steel probe easily pierces wire insulation to check circuit continuity. Usage instructions: Connect the clip to ground or the car Chassis or ground. The built-in light will glow when you find the live wire to find a break in the circuit. Please probe until the light turns off for fuse testing to test brake lights. ETC: connect the crocodile clip to the chassis, then probe the base of the shell Note: Please touch the tip of the tester to the fuse terminal. A glowing light means a working fuse Features Product Type: Automotive Circuit Tester Probe Pack Size: 3 Pack Voltage Range: Confirm packaging: 6-12V or 6-24V Circuit Type: Automotive / Low-Voltage DC Indicator: Built-In LED Light Probe: Sharp Steel Piercing Probe Connector: Crocodile Clip Lead Length: Approx. 4.5ft Suitable For: Car Fuses, Lights, Sockets, Basic Vehicle Wiring Colour: Yellow Quantity: 3 Pieces Use Limitation: Not for mains electricity or high-voltage systems