96 Windstar electrical

I'm a virgin............................................ .......this is my first time.


I have an electrical problem with my van. When I get into it Any time I open a door that activates the light (and when I am inside and I turn on the inside lights with the dimmer), the inside dome lights start flashing and continues to flash for approx. 1.5 min. Any ideas why? I have disconnected the battery and stepped on my brakes, as recommended by our local dealer, with no change. This started when I changed the battery 2 weks ago.