Had the washer problem with my 95X. Found a link on this site that fixed my problem which I have pasted below. My problem was the washer rarely worked and the intermittant cycles were unpredicatable. From reading other messages it appears the duration is speed controled which I think is stupid.
I never experienced the wipers going on by themselves.
Other than the washer working perfectly now I don't know if the wiper control has improved since it hasn't rained yet for me to test. Please note with the below repair, the cap (Robert the Author) said to use an exacto knife on it whch was good advice. The cap he refers to is at the very end of the stalk. Use the tip of the exacto knife and go under the knurled portion of the stalk, and on the outer portion of the cap. Getting the cap of without damaging the plastic was the hardest part for me. Diassembling and cleaning was very easy as was assembly. It appears that Ford loads the stalk with grease, and in time hardens, thus forming a insulator for the contacts. So even if you replace the stalk at 175.00 in time the problem will manifest itself again.
I was so happy to get my washer working at will, I disconnected the waher hoses and blew them out.
No more pissing in the wind, got some nice pressure now. Hope this cleaning of the contacts helps you guys.
PASTED REPAIR MESSAGE
“I popped the end of the wiper stalk off with an exacto knife. Did it from behind incase I gouged the plastic. Once the cap is off, there is one phillips screw in the center. Remove it and carefully pull the switch off. There is a spring in there so be careful. Also there is a small spring that goes through the stalk that provides the indentions when selecting the different positions. It has a small metal cap on both ends. The grease will usually hold it in, but if it starts to fall out be sure that you don't loose it. Once you have the end of the switch off, you'll see several copper contacts and copper fingers. Carefully clean them with alcohol. I also gently lifted up on the copper fingers to provide more contact. Put it back together. The Ford charge to replace the entire stalk is $175 and they won't just try and fix the switch. I've had to clean all of my Ford's after a while. I had my Warranty company pay Ford to fix my Explorer's for the $175 charge.”