I have the vacuum operated seat lumbar adjuster. It never worked since I bought the car. I started looking at it today. The EPC parts list shows a vacuum pump. It looks like it might be under the rear seat. Does any one know where the pump is located ? Also is it supose to lift the rear head rests ? I can put them down with the button on the dash but if they are suppose to go up by themselves they don't. They come down hard and fast. Is that normal ? I think if the pump was bad I might have other problems.