Lumbar Controls
DESCRIPTIONBattery voltage from I/P Circuit Breaker #1 is applied to the Driver Seat Switch and the Passenger Seat Back Lumbar Support Switch through CKT 2240. The Switches, which are grounded at G200, normally ground both sides of the Adjuster Actuator Motors. When the Switch is moved to rearward position, battery voltage is applied to the motor through LT BLU wire and the Switch. The Motor will rotate to increase the seatback back Lumbar Support. The motor will be grounded through the LT GRN wire.
When the switch is moved to the forward position, battery voltage is applied to the motor through the LT GRN wire. The motor will be grounded through the LT BLU wire and the switch. The motor will rotate in the opposite direction and decrease the seatback lumbar support.
The ground to the Lumbar Manifold is lifted when a pressure/vacuum sensor inside the Power Seat Pneumatic Control Module senses a bladder full/empty condition. In response to these conditions the Power Seat Pneumatic Control Module shuts off the pump and lifts the ground to the air management manifold until the switch paddle is released.