Five problems related to windshield wiper/washer motor have been reported for the 1999 Ford Expedition. The most recently reported issues are listed below.
Wipers turn on automatically while switch is in the off position. Wiper motor replaced once, problem still exists.
Intermittent problem with windshield wipers turning on while switch is in off mode. Dealer notified, and informed consumer that they are aware of this problem, but no solution has been found at this time.
Intermittently the windshield wipers / rear windshield wipers will come on. Consumer cannot turn off the wipers if the wipers come on unexpecedtly, need to wait until they turn off by themselves. Ford says they are working on the problem.
Rear windshield wiper intermittently shuts off. Windshield wiper motor has been replaced twice. Still does it.
Windshield wipers continually self activate, module replacement is not available to Ford at time of failure. Constant dry wiping has scratched windshield. Mjs.