1997 Ford Expedition lighting problems

The "door ajar" signal keeps coming up on my display panel - when this happens, the interior lights come on and won't go off for 30-45 seconds. At night this is a serious hazard because neither I or my teenage children who drive it can see safely. I'm having the part replaced tomorrow but would like to be reimbursed. The service man at my local ford dealer told me they are seeing this problem a lot. It seems to me that an investigation needs to be made. Thank you.

This issue was at night while driving the headlight to see at night had turned off at a 35 MPH speed no bumps no turn just driving straight. This is a serious issue, you use your lights for night and your are left with no lights, as a result for this huge problem I received a ticket that is how I found out my lights were not working. The headlights fuses, module components, wiring were checked no issues there, as for all other lights example emergency lights, rear lights interior lights are functioning.