Seat Track: Description and Operation

Fig.2 Power Seat Track:

There are three reversible motors that operate the power seat track. The motors are connected to wormdrive gearboxes that move the seat adjusters through a combination of screw-type drive units.

The front and rear of a seat are operated by different motors. They can be raised or lowered independently of each other. When the center seat switch is pushed to the Up or Down position, both the front and rear motors operate in unison, moving the entire seat up or down. The forward-rearward motor is operated by pushing the center seat switch to the Forward or Rearward position.

Each motor contains a self-resetting circuit breaker to protect it from overload. Consecutive or frequent resetting of the circuit breakers must not be allowed to continue, or the motors may be damaged. Make the necessary repairs.

The power seat track cannot be repaired, and is serviced only as a complete unit. If any component in this unit is faulty or damaged, the entire power seat track unit must be replaced.

When a power seat switch is actuated, a battery feed and a ground path are applied through the switch contacts to the appropriate motor(s). The motor(s) and drive(s) operate to move the seat in the selected direction until the power seat switch is released, or until the travel limit of the power seat track adjuster is reached. When the power seat switch is moved in the opposite direction, the battery feed and ground path to the motor(s) are reversed through the switch contacts. This causes the motor and drive to run in the opposite direction.