Harness Opens
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2004 Ford RV Cutaway, 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, and 2004 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
The purpose is to check harness for open circuits.
- Key off.
- DLC disconnected from any scan tools.
- Disconnect the component and PCM from vehicle harness.
- Disconnect the appropriate PCM harness.
- Using an ohmmeter, isolate the circuit in question from the harness pin to the component connector pin.
- Reading should be less than 5 ohms.