Rick's Free Auto Repair Advice

Wipers won’t shut off — Ford

My Wipers won’t shut off on my Ford

If you own one of the Ford vehicles listed below and your wipers won’t shut off, here’s the fix. Ford wiper systems are controlled by the turn signal stalk on the “multi-function” multifunction switch, turn signal switchswitch. As you rotate the knob to activate the wipers, the resistance changes and the Wiper Control Module (WCM) reads the changing voltage and commands the wipers to a new speed or on/off. When wiper won’t shut off the problem is due to a poorly designed multi-function switch, not a bad WCM or a defective Generic Electronic Module (GEM). Ford has changed the part to correct the problem and now has a newer multi function switch. Before changing out the switch, make sure all the connections from the switch to the GEM and WCM module are fully seated. If they are, you will need to install the newer switch. Make sure you disable the air bag system before disassembling the cowling around the switch. An electrical mishap while working on the switch could pop off the air bag. The affected vehicles are:

1999 Taurus • 1999–2000 Mustang, Explorer, F150, F250, Ranger and Windstar •
2000 Excursion • 1999 Sable • 1999–2000 Mountainee


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