Misopily Automotive Circuit Tester Kit 6-30V Power Probe Electrical Short Open Circuit Finder AC DC Resistance Signal Test Light 20ft Extension

The all-in-one electrical tester is compatible with 99% of vehicles, reducing diagnostic time in 6 - 30V vehicle electrical systems, supporting voltage and polarity testing, continuity checking, signal circuit testing, component activation, trailer light and connection testing, short and open circuit tracking, bad ground finding, and circuit breaker overload protection.

Featuring 4 advanced modes accessible via a mode button, it can instantly display results on the LCD when the probe contacts the circuit, including DC voltage reading with 0.1 - volt resolution, AC voltage reading of max and min voltage, frequency, and duty cycle, resistance reading to check fuse and line continuity, and a tone - on/off function to avoid noise interference.

The component activation function allows easy testing of positive, negative, and open circuits, continuity, and circuit failures, as well as checking grounds and activating components on and off the vehicle, enabling the judgment of component condition without jumper wires.

As a continuity and signal circuit tester, it can easily locate wire breaks and check ground quality using the resistance mode or power switch method, and in AC mode, it can connect to a sensor's signal wire and ground to confirm proper function by viewing live max/min voltage, frequency, and duty cycle on the LCD.

Equipped with a resettable circuit breaker, it helps quickly locate short circuits by applying voltage along the line, and a built - in 10 - Amp breaker protects against overloads, cutting power and sounding a buzzer if limits are exceeded.

It comes with a 20 - foot long cord plus a 20 - foot extension cord and a cigarette lighter plug, allowing for convenient testing of electrical circuit systems around longer vehicles and trailers, and also features dual head lights and an intuitive LCD backlit digital screen for low - light testing.