Test G: Lighting Control Module (LCM) Does Not Respond To NGS Tester
- Turn ignition off. Disconnect LCM 16-pin connector C221 located behind left side of instrument panel, right of steering column. Inspect connector for loose, damaged or corroded terminals. Repair connector as necessary and retest system for normal operation. If connector is okay, reconnect connector. Turn ignition on. Perform data link diagnostic procedure. See DATA LINK DIAGNOSTIC TEST under COMMUNICATION NETWORK DIAGNOSTICS. If NGS tester indicates LCM: NO RESPONSE ON CKT 914 (BUS +), go to next step. If NGS tester does not indicate LCM: NO RESPONSE ON CKT 914 (BUS +), go to step 3).
- Turn ignition off. Disconnect NGS tester. Disconnect LCM connector C221. Using an ohmmeter, measure resistance of Tan/Orange wire between terminal No. 20 at LCM connector C221 and terminal No. 2 at Data Link Connector (DLC). See Figure and Fig 1. If resistance is less than 5 ohms, replace LCM and retest system for normal operation. If resistance is 5 ohms or more, repair open in Tan/Orange wire between LCM connector and DLC. Retest system for normal operation.
- Turn ignition off. Disconnect NGS tester. Measure resistance of Pink/Light Blue wire between terminal No. 28 at LCM connector C221 and terminal No. 10 at DLC. See Figure and Fig 1. If resistance is less than 5 ohms, replace LCM and retest system for normal operation. If resistance is 5 ohms or more, repair open in Pink/Light Blue wire between LCM connector and DLC. Retest system for normal operation.
Courtesy of FORD MOTOR CO.