Idle Air Control Solenoid
WARNING: This page is about a different car, the 1998 Ford Windstar. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition off. Disconnect IAC wiring harness connector. Connect DVOM positive lead to VPWR (White/Red wire) terminal of IAC solenoid wiring harness connector. Connect DVOM negative lead to IAC terminal. If resistance is 6-13 ohms, go to next step. If resistance is not 6-13 ohms, replace IAC valve assembly.