Harness Opens
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2005 Ford RV Cutaway, 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
The purpose is to check the harness for open circuits.
- Key OFF.
- Disconnect the component from the harness.
- Disconnect the appropriate PCM harness.
- Using an ohmmeter, isolate the circuit in question from the harness pin to the component connector signal pin.
- The resistance value should be less than 5 ohms.