- 6-24V Auto Probe with an integral worklight to aid use in dark engine bays plus an audible circuit tester for when the LED on the probe cannot be seen. - A brilliant tool for the auto electrician and mechanic. - Carry out the following tests on systems from 6V up to 24V quickly and efficiently: - Polarity test. - Power up components prior to fitting including: - Cooling fan motors - Fuel pumps - Window/Sunroof motors - Relays and Lamps - Wiper motors - Tests continuity in: - Switches - Diodes and Fuses - Relays - Wiring harnesses - Detect short circuits. - Locate bad earths quickly. - Fitted with a sensitive short circuit protection device. - Safe to use around vehicle?s electronic management systems. - Power switch self test means no need to: - Double check ...