interior lights flashes on and off, door ajar flashes on the dash and door locks are going crazy please help.

Find the fuse/relay panel next to the battery and remove the IOD fuse for a minute or so. This resets the body control module which controls most of the electronics in the van. A weak battery is another possibility.

Thanks for your help. I removed the IOD fuse but that didn"t work and I have a brand new battery. What I did was replace the IOD fuse and it stopped the doors locks from going crazy. Now the door ajar light and the interior lights don't come on when I open the door, but I did find out I have a short so when that's fix hopefully the problem will be taken care of so thanks.