OTC 3385 Universal Gauge and Component Tester Pinpoint problems in fuel oil temperature and vacuum electrical gauges This gauge and component tester includes a test light and switch to also test instrument voltage regulators on various vehicles Use it as an instrument gauge tester by attaching the alligator clips to sensors and wiring harnesses on a variety of vehicles Included is an instrument gauge application data sheet listing resistance set points Determination of damage by impact tools is subject to SPX evaluation and discretion