Offers a quick, complete diagnostic solution for all 6- to 30-volt vehicle electrical systems. Featuring an AVOmeter, test light, built-in flashlight, short circuit indicator, relay/component tester, continuity tester, and bad ground indicator, this tool is both powerful and affordable, enabling users to check circuitry in a single step.

Supports four testing modes: DC voltage, AC voltage, Resistance, and Tone On/Off. In AC voltage mode, the tester reads maximum/minimum voltage, frequency, and duty cycle. In Resistance mode, it reads resistance between the tip and auxiliary ground lead. Toggle settings quickly using the mode button.

Supports component activation in three scenarios: in-hand, in-vehicle, and with ground. By generating activation signals, you can test if electrical components like lights, motors, wipers, radiator fans, relays, and injectors are in working order. Also useful for locating bad grounds quickly.

Instantly identifies positive, negative, and open circuits. When connected to a positive terminal, the red LED lights up and a beep sounds. For a negative terminal, the green LED lights up with a low-pitched tone. Open circuits leave the LED off.

Features built-in short-circuit protection. An internal circuit breaker trips if overloaded, acting as a crucial safety safeguard. Perform an instant self-test by flipping the power switch to verify tool functionality before diagnosis.

Comes equipped with a bright built-in flashlight for working in dark compartments. The 20-foot extendable cable provides exceptional reach across standard and heavy-duty vehicles.