Test B: Generic Electronic Module (Gem) Does Not Respond To NGS Tester
- Turn ignition off. Disconnect GEM 26-pin connector located behind center of instrument panel. Inspect GEM connector and Data Link Connector (DLC) for physical damage, bent terminals or corrosion. Repair connectors as necessary and retest system for normal operation. If connectors are okay, go to next step.
- Measure resistance of Light Blue/White wire between terminal No. 25 at GEM 26-pin connector and terminal No. 7 at DLC. See Figure and Fig 1. If resistance is less than 5 ohms, replace GEM and retest system for normal operation. If resistance is 5 ohms or more, repair open in Light Blue/White wire between GEM connector and DLC and retest system for normal operation.
Courtesy of FORD MOTOR CO.