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Test "M" (Temperature Setting Is Not Retained In Memory)

WARNING: This page is about a different car, the 1996 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

  1. Check EATC System

    Test EATC system operation. See EATC SYSTEM TEST under TESTING. Repair as necessary. If system tests okay, go to next step.

  2. Check Memory Power Supply To EATC Module

    Turn ignition off. Measure voltage between known-good ground and terminal No. 12 (Light Green/Yellow wire) of EATC module connector. If battery voltage does not exist, go to next step. If battery voltage exists, replace EATC module (control panel).

  3. Check Light Green/Yellow Wire

    Turn ignition off. Remove memory fuse No. 9 from instrument panel fuse box. Measure resistance of Light Green/Yellow wire between terminal No. 12 of EATC module connector and output side of memory fuse cavity. If resistance is 5 ohms or less, replace EATC module (control panel). If resistance is more than 5 ohms, repair open Light Green/Yellow wire.
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