If you need to reset the air suspension on your Ford Expedition, there are a few things you'll need to do. First, you'll need to find the air suspension switch, which is usually located in the glove box. Once you've found the switch, simply press and hold it for about 5 seconds. This will trigger the system to automatically level itself out. If the system doesn't seem to be responding, you can try pressing and holding the switch for a longer period of time, up to 10 seconds.