I have a 1988 Fiero GT and it has the lumbar adjustments on the driver's seat. Does anyone know which buttons are supposed to do what? The rocker switch furthest back inflates the lower back bladder but only rocks backwards, not forward. I can't seem to let any of the air out. The rocker switch at the front of the seat does nothing and only rocks forward. It then has 3 push buttons in the middle that do nothing.