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Home >> Ford >> 2004 >> Freestar Base >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> General Servicing >> HVAC Control System >> Diagnosis And Testing >> Climate Control System >> Pinpoint Test E: No Communication With The Electronic Automatic Temperature Control (EATC) Module >> Normal Operation

Normal Operation

Under normal operation, the EATC module receives a ground through circuit 1203 (BK/LB). The EATC module is supplied constant battery voltage through circuit 1001 (WH/YE) and ignition switched voltage through circuit 1003 (GY/YE).

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