?Car line detection instrument, which use the modern detection technology, electronic technology, to test car line without disassemble the detection ?With the function of multimeter (voltage, resistance, diode, buzzer, etc.) ?Designed to detect the poor contact and aging lines,combine two test modes to judge faults accurately easily and avoid misguide ?Do not break the skin of the control line or signal line, it is convenient and fast to install the automobile electric appliance ?Unique structure design,easy to operate in a narrow space or dim light space