When you drive in foggy conditions, being able to see the road is important. Fog lights help you to do that without blinding other drivers, as high beams on your headlights can. A non-working fog light should be replaced to make it safer to drive when in a heavy rain or thick fog. Like the headlights, the fog lights are in a particular shape for the make, model and year of a vehicle. This is why this information is so important when searching for the right fog lights for your Ford Escort.