Check the listing for details. 6-24V Car Circuit Tester Probe Voltage Continuity Tester Test Light Short Finder. Condition: New. Listed at 18.99 USD. AUTOOL BT160 6-24V DC car electrical circuit tester short and open circuit finder is the best electrical tester to reduce the diagnostic time in automotive electrical systems.Its' long cable makes testing easy.After a simple connection of the unit to the vehicle's battery, the automotive technician can conduct a positive or negative battery current to the tip by turning the switch forward or backward.The unit has short circuit protection and can check for bad ground contact instantly.It allows you to track and locate short circuits.You can also test continuity with the help of your auxiliary ground lead. Features:➤ 1.【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.) ➤ 2.【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.) ➤ 3.【Diode test】Quickly test the working status of the diode assembly and determine whether the circuit is open or continuous. . ➤ 4.【Grounding test】It can detect whether the component has a large current flow, and test whether the negative grounding of the component is good.(The green light is on with a beep, indicating that the grounding is good; the green light is on without beep,indicates poor grounding. ➤ 5.【Overload protection】 In case of overload or load of current, the machine will automatically open circuit protection and alarm beep to reduce unnecessary losses. ➤ 6.【DC voltage test】The test range is 6~24V DC voltage. Support 6~24V DC Voltage TestAUTOOL BT160 is suitable for the diagnosis of all 6V to 24V DC vehicle electrical systems. It checks the continuity of switches, relays, as well as diodes, fuses, wires and circuits, which can help reduce diagnostic time for automotive electrical systems. Clear Guidance of Indicator LightThis power circuit probe kit helps quickly identify the positive and negative of cables and plugs. The red light indicates the positive, while the green light indicates the negative. Continuity TestAUTOOL BT160 circuit tester can carry out continuity test. Test Procedure: Unfold the tool's cable and connect the red clip to the positive end of the vehicle battery and the black clip to the negative end of the vehicle battery; connect the auxiliary ground wire to one side of the test lead and the probe tip to the other side.f there is continuity in the vehicle circuit, the LED will glow green. If the LED does not glow, there is no continuity. Check for Poor Ground ContactTest procedure: unfold the cable, connect the red clip to the positive end of the vehicle battery and the black clip to the negative end of the vehicle battery; press the button to the "-" side, the LED should glow red and provide positive voltage; then quickly get the probe tip as close as possible to the negative end of the component, at this point, the LED turns green and the buzzer sounds. This indicates a good ground. In case the ground is poor, the LED remains red and the buzzer fails to sound. •Quick Self-test AUTOOL BT160 circuit tester can perform quick self-test on vehicle circuit system. Test Procedure: Unfold the tool's cable and clip the red clip to the positive end of the vehicle battery and the black clip to the negative end of the vehicle battery; press the front (-) of the power switch and the LED should glow red, press the rear (=) and the LED should glow green, indicating that the tool is now ready for use. If the LED does not come on, the clip may be poorly connected or the unit may be damaged. Packing List:1*AUTOOL BT160 automotive circuit tester main unit 1*User Manual 1*Qualification certificate 2*Battery clip adapter (red, black) 1*Cable clip 1*Probe tip 1*4m extension cable