Reliable, easy-to-use automotive circuit tester for 6–24V DC systems. Designed to find shorts, check continuity, and identify polarity quickly — with a long cable and built-in overload protection for safer diagnostics. Key benefits Fast diagnosis: Detect short circuits, continuity issues, and polarity without disassembling wiring harnesses — saves time and reduces repeat trips. Wide compatibility: Works across 6–24V DC systems, making it suitable for most cars, trucks, motorcycles, batteries, and small electrical systems. Safer testing: Built-in overload protection automatically disconnects the tester if current exceeds 8A, protecting both the tester and vehicle circuits. Better reach and access: 16-foot cable gives ample length to reach tight or awkward areas around the engine bay, underdash, or chassis without stretching or moving the vehicle. Simple hookup: Red and black clips clearly mark positive and negative connections for fast, error-free setup; straightforward operating instructions make the tool usable by pros and DIYers. What it does (functions and performance) Voltage range: Operates reliably between 6–24V DC. Tests: Identifies short circuits, checks continuity, and determines polarity. Safety cutout: Automatically disconnects when current exceeds 8A to prevent overload damage. Cable length: 16-foot cable for extended reach during diagnostics. Connection: Red clip for positive, black clip for negative battery terminal connections for quick and correct placement. Practical applications (use scenarios) Locate a shorted tail-light circuit: Clip to the battery, probe the wiring to find where continuity fails or unexpected voltage appears without removing the bumper or light assembly. Confirm battery and charging system status: Verify battery polarity and continuity while checking alternator output or tracing charging faults on vehicles and small equipment. Check fuse blocks and wiring harness continuity: Quickly test fuses, connectors, and splices in-line to identify open circuits or poor connections during troubleshooting. Why technicians and enthusiasts choose it Practical for daily shop use or weekend projects because it combines essential testing functions in one tool. Long cable and clear clip color-coding speed up diagnostics and reduce user error. Overload protection reduces the risk of damaging sensitive circuits during testing. Includes easy-to-follow instructions and color-coded clips for immediate use. Compatible with vehicles, batteries, and general 6–24V DC electrical systems.