1.Multipurpose Tester: Our Car Circuit Tester features a multifunctional integrating design, including load device and bulb load testing, pulse signal and voltage testing, and polarity display. Diagnose short circuits or fuse faults quickly and easily with this diagnostic tool 2.Efficient Circuit Testing: The Car Circuit Tester provides a unique combination of bulb mode and LED digital display to diagnose a wide range of electrical issues, including battery failure and fuse faults. Equipped with three working modes, this tester allows you to choose the mode that suits your needs 3.Improved Testing Capability: Equipped with a test bulb on the to quickly determine wire power failures, discover invisible poor contacts, and identify virtual voltage faults; this tester can also perform pure voltage testing and bulb load testing, providing more accurate results 4.Modernized Testing Process: Conduct load simulation testing directly, with our Car Circuit Tester displaying positive and negative polarity using red and green LEDs. Equipped with load plugs and a clear display for simple and efficient testing