1. Determine at a glance whether the circuit is positive, negative or open, without the need to reconnect the clip from one battery pole to the other. 2. Test continuity through the built-in auxiliary ground wire. 3. By pressing the power switch, positive or negative battery current is conducted to the probe tip to test the function of electrical components without using jumpers. 4. Without the voltage drop test, immediately test for poor grounding. The tool also has short-circuit protection; if the internal circuit breaker is overloaded, it will trip. 5. Follow and locate short circuits without wasting fuses. The long cable of the tool allows you to test along the entire length of the vehicle without having to constantly search for a suitable vehicle ground. Autel PowerScan PS100 features: Perform various types of services, including power injection, measurement, ground test, polarity check, continuity test and component activation Easy to read AVOmeter allows you to read voltage, current and resistance at your fingertips By flipping the power switch, you have an instant heat/ground lead for powering electrical components such as cooling fans, relays, etc. Simultaneous use of hot and ground leads to activate the components in the hand Instantly identify positive, negative and open circuits Test the instant contact of the broken ground, allowing you to quickly track and locate the short circuit without wasting the fuse Instantly check the continuity of switches, relays and diodes Circuit breaker protection Built-in flashlight allows you to work in the dark Audio tone indicator allows users to perform unappearance menu scrolling after familiarizing with the menu tone assignment 20-foot (expandable) cable provides excellent vehicle test accessibility

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