2002 Dodge Caravan Interior Power cutouts

I have a 2002 Dodge Grand Caravan 3.3L 6 Cylinder. Over the last couple of days, the blower, stereo, and windshield wipers will cut out all of a sudden while driving. The power remains off for a varying time on these systems, but returns. I am not sure of the correlation between these systems other than that they are all controlled internally. I'm also not sure if any other systems are being affected. This issue began during a heavy rainstorm a couple of days ago, but has continued despite the lack of rain since. What can I do on my own to diagnose and correct the problem?