Test A: 4-Wheel Anti-Lock Brake System Control Module Does Not Respond To Scan Tool
- Turn ignition off. Disconnect 4WABS control module 24-pin connector, located on left front frame rail. Inspect connector for loose, damaged or corroded terminals. Repair connector as necessary and retest system for normal operation. If connector is okay, go to next step.
- Measure resistance of Light Blue/White wire between terminal No. 5 at 4WABS control module connector and terminal No. 7 at DLC. See Figure and Fig 1
. If resistance is less than 5 ohms, replace 4WABS control module and retest system for normal operation. If resistance is 5 ohms or more, go to next step.
- Disconnect 76-pin connector C234 (Natural) located on driver's side of engine compartment on firewall. Inspect connector for loose, damaged or corroded terminals. Repair connector as necessary and retest system for normal operation. If connector is okay, go to next step.
- Measure resistance of Light Blue/White wire between terminal No. 43 at female half of connector C234 and terminal No. 7 at DLC. See Figure and Fig 2
. If resistance is less than 5 ohms, repair open in Light Blue/White wire between 4WABS control module connector and connector C234. If resistance is 5 ohms or more, repair open in Light Blue/White wire between DLC and connector C234. Retest system for normal operation.
Courtesy of FORD MOTOR CO.
Courtesy of FORD MOTOR CO.