Power Seats

There are four reversible motors that operate the power seats.
The forward/back motor is operated by the entire seat switch. When it is held in the FORWARD position, battery positive voltage (B+) is applied through the forward switch contacts to the forward/back motor. The motor is grounded through the contact of the BACK position switch to ground. The motor runs to drive the seat forward until the switch is released. The BACK position works similar to the FORWARD position except the voltage to the motor is reversed. This reversed polarity causes the motor to run in the opposite direction and drive the seat backward.

The front and rear of a seat are controlled by different motors. The front and rear height motors work in a similar way to the forward/back motor when the front or rear height switch is operated. They can be raised or lowered independently of each other. To raise the entire seat, the entire seat switch is held in the UP position. This applies battery positive voltage (B+) to both the front height and rear height motors. The motors are grounded through the switches that were not operated. Both motors run to drive the entire seat up. A similar action occurs to move the entire seat down.

The recline motor also operates in a similar way to the other motors when the recline switch is operated. The seat back can be reclined up or down.
Each motor contains an electronic circuit breaker (PTC). When the seat has reached the end of travel in any direction, the motor will stall. The circuit breaker opens, stopping the motor. The circuit breaker resets only after voltage is removed from the motor.