Vacuum Pump Switch: Description and Operation

1. Disconnect connector, then using a suitable volt/ohmmeter ensure continuity exists between terminal and body ground.
2. Connect a Mity Vac or suitable vacuum device to vacuum switch outlet.
3. Ensure there is no continuity between terminals with a vacuum between 6.30 and 7.1 inches Hg.
4. Ensure there is continuity between terminals with no vacuum present.