Multi-function automotive circuit tester kit designed for accurate, efficient electrical troubleshooting Key benefits Diagnose problems faster: Combines voltage detection, diode testing, continuity checking, ground detection and short-circuit tracking in one handheld tool to reduce guesswork and repair time. Improve accuracy and confidence: High-definition LCD displays precise voltage readings while polarity LEDs instantly indicate positive or negative terminals, helping you avoid misdiagnosis. Work in any light: Built-in maintenance lighting illuminates the work area for safe, accurate testing at night or in tight, poorly lit engine bays. Versatile and dependable: A single kit that covers the most common electrical checks technicians and DIYers perform on vehicles. What it does (functions) Voltage detection: Read system voltage clearly on the HD LCD to verify battery, charging and accessory circuits. Diode detection: Check diodes in alternators, rectifiers and electronic components. Continuity testing: Quickly confirm wiring and connector continuity without removing components. Ground detection: Verify good chassis or component grounds to eliminate intermittent faults. Short-circuit tracking: Trace and locate shorted circuits so you can find and repair the problem source. Practical attributes Compatibility: Designed for automotive electrical systems and the common diagnostic tasks encountered on cars and light trucks. User-friendly display: High-definition LCD plus polarity LEDs provide clear, unambiguous feedback even in low light. Portable form factor: Handheld kit suited for shop or roadside use; designed for practical, on-vehicle troubleshooting. Reliable performance: Combines multiple test modes in one tool to reduce the need for multiple separate testers. Typical use scenarios Vehicle won’t start or battery seems weak: Use the voltage detection to check battery and charging system voltage, then test continuity and grounds to find parasitic drains or poor connections. Blown fuses or recurring electrical faults: Use the short-circuit tracking mode to locate a shorted wire or component and confirm diode and continuity status on suspect parts. Nighttime repairs and inspections: Built-in maintenance lighting and the LCD make it easy to test connectors, grounds and sensors in dimly lit engine compartments or under dash areas. What to expect A compact, multi-function circuit tester kit that streamlines common automotive electrical diagnostics, delivers clear voltage and polarity feedback, and includes lighting for nighttime or low-light troubleshooting. Practical for professional technicians and DIY mechanics who need fast, reliable electrical checks.