Circuit/System Description

Battery voltage is supplied at all times to the seat lumbar support switch through a 15A fuse located in the underhood fuse block. When a lumbar switch is pressed to inflate the lumbar support, battery voltage is applied through the switch contacts and the inflate control circuit to the seat lumbar support pump. In response to this command, the pump energizes its internal inflate solenoid and runs to inflate the lumbar bladder until the switch is released. When the switch is pressed to deflate the lumbar support, battery voltage is applied through the switch contacts and the deflate control circuit to the seat lumbar support pump. The pump energizes its internal deflate solenoid and air is released from the bladder until the switch is released.