GUAngqi Auto Truck Car Electric Circuit Voltage Tester Test Light Pen Tool Copper Pencil

To test fuses and light sockets (break lights, back-up lights, etc).
Can help you find broken and live wires.
Ideal for auto, boats, motor cycles and small engines.
With grounding wire connected to handle.
Quickly check automotive headlights, taillights, turn signal circuits, faulty sockets, connections, fuses, broken wires and more.