Non-Sixty Special

The six-way power seat moves when voltage is applied to one or more of the three seat motors. The direction the motor turns depends on the supply voltage polarity which is set by the control switches, and sent to the motors by the Seat Memory Module. Therefore, the LH seat switch does not power the seat motors directly.

The three seat motors directly operate the three seat movements: front height, rear height, and forward-back.

Control power to the seat motors is available at all times through Circuit Breaker 24 and the ORN/BLK (60) wire to the Seat Memory Module; and through I/P Fuse Block Fuse 15 and the ORN (640) wire to the LH seat switch. The seat motors return path to ground is from the seat motor, back through the Seat Memory Module and LH Seat Switch to ground G200.

The memory functions operate only when the Gear Selector Lever is in PARK and the Ignition Switch is in RUN, BULB TEST or START.

The Seat Memory Module controls the three seat motors by turning them off and on and by using their selected directions. The selections are made by the switches in the LH Seat Switch.

The memory seat system provides an automatic driver's seat return to one of two preset positions. When a switch is closed to operate the power seat, the solid state module transmits the voltage applied from the switch to the motors. To remember the seat location, motor transmission cable position sensors are utilized. These sensors are potentiometers which are mounted to each motor's transmission cable. As the motor transmission cable rotates, the potentiometer resistance is varied. The seat position is determined by the voltage level sent to the Seat Memory Module by the position sensor. If the Seat Memory Button is pushed, and the Memory Select Switch is moved to Memory I or 2, the voltage level is stored to remember seat position.

Although the power seat system may be operated with the Ignition Switch in any position, the memory unit only functions if the Gear Selector Lever is in PARK, and the Ignition Switch is in RUN, BULB TEST or START.

With the Easy Exit Switch closed, voltage is applied simultaneously to the Seat Memory Module's memory 1 and memory 2 inputs. This signals the module to move the seat to a fully down and fully back position. The module applies voltage to all three LH seat motors until the seat is fully back and down. The easy exit function operates the Ignition Switch in OFF.

Each motor contains an electronic circuit breaker (PTC). It resets only after the voltage is removed from the motor.