Test J: Electronic Automatic Temperature Control (EATC) Module Does Not Respond To NGS Tester

1. Turn ignition off. Disconnect Electronic Automatic Temperature Control (EATC) module connector C297 located behind center of instrument panel. Inspect EATC module connector for physical damage, bent terminals or corrosion. Pay particular attention to terminals No. 13 (Pink/Light Blue wire) and No. 14 (Tan/Orange wire). Repair or replace connector as necessary and retest system. If connector is okay, go to next step.
2. Measure resistance of Pink/Light Blue wire between EATC module connector C297, terminal No. 13 and DLC, terminal No. 10. See Fig 1. If resistance is less than 5 ohms, go to next step. If resista nce is more than 5 ohms, repair open in Pink/Light Blue wire between EATC module connector and DLC and retest system.
3. Measure resistance of Tan/Orange wire between EATC module connector C297, terminal No. 14 and DLC, terminal No. 2. See Fig 1. If resistance is less than 5 ohms, replace EATC module and retest system. If resistance is more than 5 ohms, repair open in Tan/Orange wire between EATC connector and DLC and retest system.

Fig 1: Identifying EATC Module Connector C297 & DLC

Courtesy of FORD MOTOR CO.