Seats: Description and Operation

There are three reversible motors that operate the Power Seats. The front and back heights of the seat are controlled by different motors which can be raised or lowered independently of each other by pushing the front or rear of the Power Seat Switch. When the Entire Power Seat Switch is pushed to the UP or DOWN position, both motors run to move the front and back of the seat up or down at the same time.

The Forward-Back Motor is operated by the Power Seat Switch. When it is he]d in the FORWARD position, battery voltage is applied through the switch contacts to circuit 285 and the Forward-Back Motor. The motor is grounded through circuit 284 and the contacts of the Power Seat Switch. The motor runs to drive the seat forward until the switch is released.

With the Power Seat Switch in BACK, circuit 284 receives battery voltage and circuit 285 is grounded. This reverse polarity causes the motor to run in the opposite direction and drive the seat backwards.

The Front and Rear Height Motors operate in a similar way when the front or rear of the Power Seat Switch is operated.

The entire seat is raised when the Power Seat Switch is held in the UP position. This applies battery voltage to circuits 282 and 286, and ground to circuits 283 and 287. Both motors run to drive the entire seat up. A similar action occurs to move the entire seat down.

Each motor is protected by a built-in Electronic Circuit Breaker (PTC). If the Power Seat Switch is held too long with the seat obstructed or after the seat is fully up, down, forward or back, the PTC resistance increases. The resistance returns to normal after voltage is removed from the motor terminals.