Circuit Description

When the lumbar forward 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. The pump energizes its internal inflate solenoid and the pump runs to inflate the lumbar bladder until the switch is released. When the lumbar rearward switch is pressed to deflate the lumbar support, battery voltage is applied through the switch contacts and the deflate control circuit to the lumbar support pump. The lumbar pump energizes its internal deflate solenoid and air is released from the bladder until the bladder is 100% deflated or the switch is released.