Automotive 6-24v Auto Probe 12v Power Circuit Electrical Tester New -Sealey PP1A 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 harnessesDetect short circuits.Locate bad earths quickly.Fitted with 4.5m cable allowing access to the rear of the vehicle and supplied with instructions.