Head Rest: Description and Operation

When the headrest switch is operated to raise the headrest up, battery positive voltage (B+) is applied via the headrest up switch contacts and the headrest motor up control circuit to the motor. The motor is grounded via the headrest down switch contacts and the headrest motor down control circuit to the motor. The motor runs in order to move the headrest up until the switch is released. Moving the headrest down works similarly to moving the headrest up except that battery positive voltage (B+) and ground are applied on the opposite circuits causing the motor to run in the opposite direction.