Power Lumbar Support System

The power lumbar support system consists of:
^ seat back control switch (part of seat regulator control switch)
^ front seat back pad adjuster
^ front seat back pad adjusting pump
^ front seat adjusting motor drive tube (part of front seat back pad adjuster)
^ circuit wiring
^ circuit protection

While inflating the front seat back pad adjuster, the front seat back pad adjusting pump pumps air through a solenoid to the front seat adjusting motor drive tube and into the front seat back pad adjuster.

While deflating the front seat back pad adjuster, the front seat back pad adjusting pump pumps air from the front seat back pad adjuster and expels the air as exhaust through a solenoid to the atmosphere.