Features:-Find The Short Circuits: In most cases, a short circuit will manifest itself as a blown fuse or a tripped electrical protection device. Use the probe tip to activate and energise each fuse contact. The contact that trips the circuit breaker is the short circuit.-Find The Bad Ground: Use a probe tip to detect a suspected earth wire or contact. If the circuit breaker trips, the circuit is likely to be well grounded.-Testing Trailer Lights: While the tool in DC Voltage mode, clip the auxiliary ground lead to the trailer ground , probe the contacts at the jack and then apply voltage to the probe tip. This lets you check the function and orientation of the connector and trailer lights.-Check Continuity: While the tool is in Resistance mode, using the probe tip with chassis is ground or the auxiliary ground lead, continuity can be tested on wires and components attached or disconnected from the vehicle's electrical system.-Activating Component: The component activation function is used to generate activation signals to the component under test, such as activating lights, motors and other on-board electrical equipment.-Signal Circuit Testing: Once you extract a DTC from the vehicle and realize that troubleshooting begins with some kind of sensor circuit, there is a quick test you can perform to verify the code. Testing your sensor is easy while using the tool.-Voltage & Polarity Testing: When the tool is in DC voltage mode, touch the probe tip to the positive circuit. If the probe tip contacts an open circuit, neither LED will light.Specifications:Item name: Automotive Circuit TesterModel: P100 PlusDC voltage range: 0-65VResistance range: 0-100 kRated current: 1-10 ampsFrequency response of sound passage: 0Hz to 10Khz.4 modes: DC voltage, AC voltage, Resistance, Diode.Three additional modes: MIN / MAX / audible monitoring.High voltage capability: displays up to 60 volts, 0.1 volt resolution.Total weight: about 1.3kg/2.86lbPackage size: 26*22*8cm/10.23*8.66*3.14inThe package:1* Automotive Circuit Tester, 1* Test Probe, 1* Test Connecting Wire, 1* Clamp, 1* Patch Cable, 1* Instruction Manual, 1* Packaging Toolbox.Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 10-30mm. Return Policy All of our items come with a 30-day free return policy. If you need to return, please contact us, let us know the detailed problem and send us some pictures for confirmation. We reserve the right to refuse any returns for objective reasons. Shipping Policy All of our items are shipped free with tracking numbers. Orders will be shipped within 3 working days upon receipt of payment. Most orders will be shipped within 1 working day. In most cases, shipping takes 8-12 working days.