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Home › Buick › 1979 › Skyhawk Base, Automatic Trans › Repair and Diagnosis › Heating, Ventilation & A/C (HVAC) › HVAC Control Systems › Auto. A/C Systems - Automatic Climate Control › Component Replacement › Vacuum Checking Relay › All Models › Installation

All Models: Installation

  1. Position checking relay in programmer with ports "T" and "2" toward aspirator. See Figure.
  2. Make the following vacuum hose connections:
    • White hose from transducer wraps around aspirator and connects to port "2". If this hose is replaced, it MUST be the same length.
    • Yellow hose from vacuum motor connects to remaining port "1" on vacuum motor side of relay.
    • Purple hose from "PURP" port of vacuum valve connects to center port ("3") of checking relay.
    • Remaining black hose from center port of vacuum valve to outside port ("5") of checking relay.
  3. Install programmer cover and programmer.
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