Pinpoint Test E - Front Wipers Inoperative At Interval Setting
WARNING: This page is about a different car, the 1997 Mercury Villager. However, it is still accessible from the selected car via links, so may be relevant.
Test front wiper/washer switch. See WIPER/WASHER SWITCH under COMPONENT TESTS . Replace multifunction switch as necessary. If switch is okay, replace Front Wiper Washer Amplifier (FWWA).