Test A: Anti-Lock Brake System Module Does Not Respond To WDS Or NGS Tester
WARNING: This page is about a different car, the 2002 Ford Pickup, 2002 Ford F550 Super Duty, 2002 Ford F450 Super Duty, and 2002 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition switch to LOCK position. Disconnect Anti-Lock Brake System (ABS) module harness connector C135. Inspect ABS module connector for loose, damaged or corroded terminals. Repair connector as necessary. If ABS module connector is okay, go to next step.
- Measure resistance of Light Blue/White wire between ABS module connector C135 terminal No. 1 and Data Link Connector (DLC) terminal No. 7. See Figure and Fig 1 . If resistance is less than 5 ohms, go to step 4. If resistance is 5 ohms or more, go to next step.
- Disconnect in-line 40-pin connector C146. Inspect both halves of in-line 40-pin connector C146 for loose, damaged or corroded terminals. Repair connector as necessary. Measure resistance in Light Blue wire between in-line harness connector C146 (male side) terminal No. 5 and DLC terminal No. 7. If resistance is less than 5 ohms, repair open in Light Blue/White wire between in-line harness connector C146 (female side) and ABS module. If resistance is greater than 5 ohms, repair open in Light Blue/White wire between DLC and in-line harness connector C146 (male side). See WIRING DIAGRAMS .
- Disconnect all ABS connectors and inspect for loose, damaged or corroded terminals. Repair connector as necessary. Reconnect all connectors. Operate system to verify problem. If problem is present, replace ABS module. See appropriate ANTI-LOCK article in BRAKES for removal and installation procedure. If problem no longer exists, problem may have been caused by poor contact at connector.