Long service life 12V test light features a two-pin lamp design, making it resistant to overheating and damage during extended use. Needle fixed design ensures the probe remains secure, preventing it from falling off or bending. Safe and easy to use with no heat generated during operation. The sharp steel probe allows access into fuse boxes or pierces through insulation to make contact with wires, helping protect hands from potential hazards. Equipped with a spiral wire for convenient storage. Suitable for 6-12V AC and 24V DC continuity testing in electrical systems to identify open circuits, grounds, or short circuits. Quickly test vehicle headlights, taillights, turn signals, faulty sockets, connectors, fuses, wire breaks, and more. Designed for practical use with a long probe and alligator clip to test fuses, reach tight spaces, and pierce insulation. Enables fast and easy checking of connections, sockets, and wiring for short circuits or breaks. Tests voltage regulators, fuses, switches, relays, and distributors.