Lumbar Operation

Both of the lumbar motors are reversible. For example, when the lumbar switch is operated to move the lumbar forward, battery positive voltage is applied through the switch contacts and the lumbar motor forward control circuit. and ground is applied through the rearward switch contacts and the lumbar motor rearward control circuit. The motor then runs to move the lumbar support forward toward the occupant's back until the switch is released. Moving the lumbar support rearward works similarly to moving the lumbar support forward, except that battery positive voltage and ground are applied on opposite circuits causing the motor to run in the opposite direction. The lumbar support vertical motor is also powered this way.