OTC 3385 Universal Gauge and Component Tester.
This is the fast way to pin- point 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 Ford vehicles and the GM Spectrum, Sprint, and Nova. Plus, you can 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 for GM, Ford, Chrysler, Toyota, Nissan, VW, Mack, Navistar, and John Deere.