MULTI-PURPOSE VOLTAGE AND GROUND TEST PIGTAIL. USED TO CHECK IN-USE VOLTAGE SUPPLY FOR SOLENOID VALVES – HYDRAULIC OR AIR. THIS PIGTAIL PLUGS IN BETWEEN THE HARNESS PLUG AND THE VALVE. THIS PIGTAIL CAN BE USED WHEN TESTING TWO WIRE WARNING SWITCHES, LIMIT SWITCHES. AND PRESSURE SWITCHES WITH TWO PIN BLACK PACKARD CONNECTORS.