1992 Ls 400 Suspension Height Problem

[vs1957]

The normal light on the dash keeps flashing even when I switch from normal to hi on the console switch and the car does not respond. The hight goes up and down on its own with no discernable pattern some times one side goes up or down or the other side or both and mostly in the rear. When it goes down all the way it looks like a low rider in the rear.