The intermittent wiper setting on my '93 Plymouth Grand Caravan has stopped working. I hear a faint, regular clicking sounds when on intermittent, like a signal is being sent. The constant wiper settings still work fine. Also, possibly related to this, the wipers will not return to the bottom of the windshield when I turn the wiper control off. Any suggestions would be greatly appreciated. I have searched the forum and found only one similar problem but not exactly the same as mine. Thanks!