Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Ford RV Cutaway, 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, and 2003 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
After each service or repair procedure has been completed, repeat QUICK TEST to ensure all electronic engine control systems are functioning properly and DTCs are no longer present.
NOTE:
If performing repeated self-tests on models with Federal emissions, disconnect glow plug relay to keep battery from going dead. Relay is located on top, right side of engine. Ignore any glow plug DTCs while glow plug relay is disconnected.