EM287 Automotive Circuit Breaker Meter Test Device Car Diagnostic Tester Measures dc voltage from 2V to 24V Description : This item is the best electrical tester for reducing diagnostictime in automotive electrical systems. After a simple hook-upof the unit to the vehicle battery, automotive technician can conduct a positive or negative battery current to the tip by rocking the rock switch forward or backward. This item can beused to measure dc voltage and test for continuity or for bad ground contacts. It can also be used to follow and locate short circuits. It is short-circuit protected, its long cable allowsyou totest easily. Thisitem is powered by the vehicle battery directly. Applications: 1.Tests for continuity 2.Tested the polarity of a voltage 3.Measures dc voltage from 2V to 24V 4.Checks lamp 5.Checks electric motor. 6.Follows and locates short circuits. 7.Tests for bad ground contacts 8.Illumination General Specifications: Operation Voltage: 8~24Vdc Cable Length: about 5m DC Voltage Measurement Range: 2~24Vdc Overload Protection: 8A (When the current exceeds 8A, the unit will disconnect the current automatically.) Operation Temperature:0~40degree Storage Temperature:-20~50degree Size: 274x53x42mm(for main body only) Weight: about 385g Operation Instruction: Hook-up Unroll the unit cable Clamp the red battery clip to t he positive terminal of the vehicle battery. Clamp the black battery clip to the negative terminal of the vehicle battery 1.Testing the Unit and the Connections 2.Using Illumination 3.measuring DC Voltage 4.Polarity Test 5.Continuity Test 6.Activating Components out of the Vehicle Electrical System 7.Testing Trailer Lamps and Connections 8.Activating Electrical Components a.Activating components with positive (+) voltage b.Activating components with negative (-)voltage 9.Jumper Lead Feature 10.Checking for Bad Ground Contacts 11.Following and Locating Short Circuitspacklist :1pcs EM287 (Battery not include)