98 Windstar wipers front & rear wiers acting up

[gizmutt]

Maybe someone can help me. I'm not sure if it is a big problem but my wifes 98 Windstars wipers are acting up. The rear wiper will turn on by itself sometimes when the front wipers are turned on. About half the time the front washer will not operate and the wipers wont wipe when the wash button is pressed. And finally the front wiper delay will change the time delay on it's own, without anything being done to it.

Thanks,
Gizmutt