Front Wipers Inoperative At Interval Setting
WARNING: This page is about a different car, the 1997 Mercury Tracer and 1997 Ford Escort. However, it is still accessible from the selected car via links, so may be relevant.
Test wiper/washer switch. See WIPER/WASHER SWITCH under COMPONENT TESTING. Replace switch as necessary. If switch is okay, inspect Blue/White wire between switch and wiper motor for open or short. Repair wiring as necessary. If wire is okay, replace wiper switch.