My 2004 2500 seems to be having a mind of it's own when I turn on the windshield wipers. Sometimes they work when I turn them on intermittent (any of the delay settings) and other times they don't work until I turn them on on of the non-intermittent settings. I have had them make them 1 sweep or many sweeps (up to 4) when set to intermittent - just whatever it feels like doing. Any ideas? Thanks