Manuals through 2025 now available!
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LEMON is the spiritual successor to CHARM, I recommend you try it!
Link:
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lemon-manuals.org.ua
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Vacuum Switch: Testing and Inspection
1.
Disconnect vacuum hose and
vacuum switch connector.
2.
Using suitable vacuum pump, apply vacuum to
vacuum switch and check continuity through vacuum switch. There should be no continuity between terminals "C" and "NO" when intake manifold is above 22.83 inches Hg, and continuity should exist between terminals "C" and "ON" when intake manifold is below 22.83 inches Hg.