- Simple operation: After connecting the circuit tester to the vehicle battery, the technician can route the battery's positive and negative current to the probe by moving the power switch forward or backward. - Short circuit protection: The circuit tester includes short circuit protection and can detect poor grounding immediately. - Wide range of applications: The power sensor tests conductivity and voltage polarity. It can detect lights and motors and is useful for tracing and locating short circuits. This helps quickly identify shorts or poor contacts in the vehicle electrical system components. - Test cable length: The cable is approximately 16 feet long, providing reach to test various electrical systems. - Use scenarios: Diagnose a headlight circuit to determine short or ground fault; trace a malfunctioning power window or door motor circuit with limited accessibility; verify polarity and continuity in wiring harness segments during repairs or installations.