The lumbar support and bolster motors are operated by a four position switch located on the outside of each seat. Power is supplied via circuit 1440 (ORN) from the seat circuit breaker located in the left bussed electrical center (LBEC). The ground path is supplied via circuit 2350 (BLK) from the seat switch to G304. The motors direction is controlled by the switch selection using one contact for power and the opposite for ground. Reversing the switch direction will result in opposite direction of the motor. The lumbar support, bolster motors and attached hardware are serviced as one assembly.