 interior lights don't work when door is opened
I just picked up an 03 Windstar at an auction and have been fixing a few little things. I just noticed today that none of the interior lights come on when any of the doors are opened. I'v checked the position of the switches on the lights and ther in the middle. (On with door open, off when door closed) The van is an LX model and so has just the basics. MY thoughs are that the problem might be in the interior switch on the dash. Are there any relays that would be part of this system??
I sure would appreciate any input that would help. I just got it back from Ford where they fixed a broken sliding door latch and a frond wheel baring. I would like to avoid a big bill for what is probably an easy fix. thanks for your help | 
