ON MY 99 EXPEDITION WITH FRONT AND REAR AIR SUSPENSION I FOUND THAT IT SHOULD HAVE THREE SETTINGS FOR RIDE HEIGHT. DOES ANY ONE KNOW HOW TO CHANGE THESE SETTINGS? OR IF THEY CAN BE CHANGED?

MY TRUCK IS RIDING TO LOW TO THE GROUND FOR THE KIND OF WINTER DRIVIND I HAVE TO DO. THE AIR COMPRESSOR AND AIR BAGS ARE ALL GOOD. AND THE ON, OFF SWITCH IS ON. IF THERE IS A WAY TO ADJUST THE RIDE HEIGHT WHERE IS THE SWITCH LOCATED?

I have a 99 expedition that i believe has a air suspension problem, when i start it up i have to wait for the compressor to kick on and then the air bags fill up, the one in the right rear doesnt seem to fill up all the way, and after i turn the vehicle off, it sags lower than the rest of the vehicle, have you had this problem or know what it would be????