The power lumbar support system consists of the following components:
| • | A lumbar switch |
| • | A lumbar horizontal motor |
| • | A lumbar vertical motor |
The lumbar motors operate independently of each other.
The lumbar switches are located on the side of the seat. The lumbar switch directly controls the motors located in the seatback. The PWR SEAT circuit breaker provides power to the seat through the rear junction block. Each motor contains an electronic circuit breaker (PTC) that trips at the end of travel. The circuit breaker resets only after voltage is removed from the motor.
When you push the lumbar switch to the Fore position, battery positive voltage (B+) is applied through the Fore switch contacts to the lumbar horizontal motor. The motor receives ground through the lumbar AFT switch contacts. The motor then runs in order to drive in the lumbar support away from the occupant's back until one of the following events occur:
| • | The switch releases. |
| • | The motor reaches the end of travel. |
The Fore position is similar to the Out position except that the polarity is reversed. The reversed polarity causes the motor to operate in the opposite direction. The lumbar support then moves out toward the occupant's back.
The lumbar vertical motor works in a similar way when the lumbar switch operates in the UP and DOWN positions.
