Inspecting Circuitry

WARNING: This page is about a different car, the 1995 Ford Aspire. However, it is still accessible from the selected car via links, so may be relevant.

1) Visually inspect suspected sensor, switch, or solenoid. Enter WIGGLE TEST if using NGS or Super Star II tester. If using VOM, connect it to STO terminal on self-test connector, and ground STI self-test connector terminal. Lightly tap suspected sensor, switch, or solenoid.

2) Push and pull on suspected sensor, switch, or solenoid connector, but do not unplug it. Test and wiggle harness vigorously, working in small sections, from suspected device toward dash panel, and from dash panel to PCM.

3) If VOM, NGS, or Super Star II tester does not display a positive indication of an intermittent defect, carefully disconnect suspected device. Remove terminals from connector.

4) Inspect terminals at both ends for corrosion, bad crimps, or improperly seated terminals. Reconnect after inspection. Unplug harness from PCM.

5) Inspect PCM and harness connector terminals for corrosion, bad crimps, or improperly seated terminals. If VOM does not indicate any intermittent defect, reconnect wiring and erase codes.