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Vacuum Switch C

  1. Disconnect vacuum hose No. 15 to vacuum switch C and connect hand vacuum pump to hose. Apply 12 in. Hg to switch. Check for continuity between Black/Yellow and Blue/Black wire terminals of control box 6P connector.
  2. Continuity should be present when more than 12 in. Hg is applied, and no continuity when vacuum is released.
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