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QPKING Electrical Circuit System Diagnostic Tool 12V/24V Automotive Circuit Tester for Vehicle/Boat/Motorcycle/Heavy Duty/Truck Electric Voltage Integrated Power Scanner
【Polarity test】 When the polarity of the circuit under test is unknown, the positive and negative poles of the circuit can be tested.(Red light indicates positive pole, green light indicates negative pole.) 【Open circuit test】With the polarity of the circuit under test unknown,it can be tested to see if the circuit is in a continuous state or in an open-circuit state. (The green light is on means the circuit is in a continuous state; the green light is off, it means the circuit is open.)
QPKING Electrical Circuit System Diagnostic Tool 12V/24V Automotive Circuit Tester for Vehicle/Boat/Motorcycle/Heavy Duty/Truck Electric Voltage Integrated Power Scanner
