Led Long Probe Circuit Tester

Quickly and safely tests high and low voltages on all vehicle voltage, including computerized engine.
Checks high and low voltages (power and ground) on 6, 12 and 24 volt system.
High impedance to protect sensitive electronic sensors, microprocessors, electronic ignition components and air bags.
Led indicates red for power (high) and green for ground (low).
Connects the red lead to a power source and the black lead to a ground source.