[gavalcar_gp]

Check for a faulty front passenger's door switch. QUOTE]
+1 on that.
Early on in the life of my van, I had some strange problems usually right after closing driver's side door. The worst was it seemed almost every dash light would flicker on/off along with the sound of a relay clicking. Dealer couldn't find anything, so I removed and actually disassembled the door switch. Cleaned contacts and made a little adjustment for stronger contact. No more problems.