1999 Chrysler T&C intermittent electrical problem

I drove my 1999 Chrysler Town and Country over a very heavily
wash-boarded gravel road the other day. After about a mile on the
road, the "door open" light and chime illuminated and sounded. I kept
re-shutting the passenger mid-side door, but I don't think it was ever
actually open. The door locks then started to activate - they never
unlocked, they just made the sound like they were automatically locking
(like they always do at 18 mph). Also, the interior lights, that would
normally illuminate if you opened a door, started flashing. Since
then, every time we hit a bump in the road, some or all of these things
occur - often in rapid succession. We can't drive down the road
without flashing lights, door chimes and lock activation! Any ideas
for what to look for? It seems like some clip may have come loose, but
I don't know where to find it... TIA.