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Switch B

  1. On Federal 1500 HF models, disconnect No. 1 hose on control box No. 2 from vacuum hose manifold. Connect vacuum pump to hose. There should be voltage at Brown wire terminal of vacuum switch when vehicle speed is more than 10 MPH and more than 6 in. Hg vacuum is applied to switch.
  2. Disconnect No. 1 hose on control box No. 2 from vacuum hose manifold. Connect vacuum pump to hose. There should be voltage at Brown/White wire terminal of vacuum switch when vehicle speed is more than 10 MPH and less than 6 in. Hg vacuum is applied to switch.
  3. On Calif. 1500 HF models, disconnect No. 12 hose on control box No. 1 from vacuum hose manifold. Connect vacuum pump to hose. There should be voltage at Brown wire terminal of vacuum switch when vehicle speed is more than 10 MPH and more than 7.9 in. Hg vacuum is applied to switch.
  4. On High Alt. 1500 HF models, disconnect No. 12 hose on control box No. 1 from vacuum hose manifold. Connect vacuum pump to hose. There should be voltage at Brown wire terminal of vacuum switch when vehicle speed is more than 10 MPH and more than 4 in. Hg vacuum is applied to switch.
  5. On 1500 except HF models, disconnect No. 12 hose on control box No. 1 from vacuum hose manifold. Connect vacuum pump to hose. There should be voltage at Brown/White wire terminal of vacuum switch when more than 9.8 in. Hg vacuum is applied to switch.
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