1997 Ford Taurus EATC Vacuum Schematic - Hose Routing & Part Numbers

This document is an Electronic Automatic Temperature Control (EATC) vacuum schematic, uploaded to a 1997 Ford Taurus gallery. The diagram shows the vacuum hose routing for the HVAC system, including vacuum lines identified by color (black, red, white, blue, and yellow) running from the vacuum source through a check valve and reservoir tank to the various vacuum control motors that operate airflow doors. Airflow paths shown include defrost, demister, front A/C register, rear A/C register, floor, outside air, and recirculated air. A 19-item legend table maps callout numbers to Ford base part numbers and descriptions, covering components such as the windshield defroster door and its vacuum control motor (18A318), primary and supplemental A/C air temperature control doors (19A842, 19C722), the A/C air inlet duct door and motor, an optional pollen filter (19N619), blower motor (18527), evaporator core (19860), heater core (18476), A/C vacuum reservoir tank and bracket (19A566), vacuum check valve (19A563), vacuum hose harness (19C827), heater air damper door (18752), and supplemental A/C damper door components for rear seat A/C registers (19A901). A reader can identify each vacuum-operated door, its actuator, and hose color for diagnosing EATC airflow or vacuum problems.