Test F: No Operation In High Blower Setting
WARNING: This page is about a different car, the 1999 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
- Check Black Wire Circuit For Open
Turn ignition off. Disconnect blower motor switch connector. Measure resistance of Black wire between blower motor switch connector and ground. If resistance is less than 5 ohms, go to next step. If resistance is greater than 5 ohms, repair open circuit in Black wire. Retest system. - Check Blower Motor Switch
Place blower motor switch in HI position. Measure resistance between blower motor switch terminal No. 1 (Black wire) and terminal No. 2 (Orange/Black wire). If resistance is less than 5 ohms, replace blower motor. Retest system. If resistance is greater than 5 ohms, replace blower motor switch. Retest system.